Physics Past Questions v13 for (JAMB/WAEC/NECO)

Physics Past Questions v13 For (JAMB/WAEC/NECO); These Physics past questions are for students who are sitting for the following examinations

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Physics Past Questions v13 For (JAMB/WAEC/NECO)

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#1. A beam of radiation is passed between a pair of charged plates as indicated in the fig above. Beam P is undetected While Q is deflected to the left. P and Q respectively should be I.γ-rays β-rays II. x-rays β-rays III. γ-rays x-rays IV. x-rays x-rays

A) I only

B) III only

C) I and II

D) III and IV

#2. The air column as shown above is set into vibration by the turning fork. In this State of resonance, the waves in the air column will be

A) stationary and transverse

B) stationary and longitudinal

C) progressive and transverse

D) progressive and longitudinal

#3. In the above circuit diagrams A is the ammeter and V is the Voltmeter. Which of the circuits is correct for finding the correct value of the resistance R

A) I

B) II

C) III

D) IV

#4. Three 2-µF capacitors are arranged as seen in the circuit above . The effective capacitance between E and F is

A) 0.75µF

B) 1.33µF

C) 3.00µF

D) 6.00µF

#5. The total power drawn from the cell in the circuit above is Note: The cell voltage is 12V and all three resistors are 4 ohm resistors.

A) 12W

B) 24W

C) 32W

D) 40W

#6. The figure above shows a conductor PQ carrying a current I in the direction shown. At a particular position near the conductor is a compass needle K. Neglecting the earth's magnetic field, the compass needle will

A) settle in any direction

B) settle in a fixed direction only if the conductor PQ is a magnetic material

C) settle in a fixed direction WHETHER the conductor PQ is a magnetic material OR NOT

D) be stationary

#7. The figure above shows a uniform circular object, center R and diameter PS. A circular section 6 and Diameter PR is cut from it. if PQRS is a straight line, where is center of gravity of the figure

A) Q

B) R

C) A point between P and R

D) A point between R and S

#8. A simple pendulum of mass m moves along an arc pf a circle radius R in a vertical plane as shown above. What is the work done by gravity in a downward swing through the angle q to 0 degree

A) mgR sinθ

B) MgR (1- cos θ)

C) mgR

D) mgR (1 - sinθ)

#9. A block of mass m is held in equilibrium against a vertical wall by a horizontal force. If the coefficient of friction between the wall and the block is µ, the minimum value of the horizontal force is

A) µmg

B) (1-µ)mg

C) (1+µ)mg

D) mg/µ

#10. In the figure above W1 = 200g, and W2 =450g . Calculate the extension of the spring per unit load? [g = 10ms-2]

A) 6.0 x 10-5mN-1

B) 2.5 x 10-4mN-1

C) 6.0 x 10 -3mN-1

D) 2.5 x 10 -2mN-1

#11. The function of a 5-A fuse included in a circuit supplying a household refrigerator with power is to keep the

A) Temperature of the refrigerator low and constant

B) keep current supplied to the refrigerator below 5A

C) Voltage supply constant

D) Current supplies to the refrigeration

#12. An object is placed at 5.6 x 10-4m in front of a converging lens of focal length 1.0 x 10-nm. The image formed is

A) Real, Erect and magnified

B) Virtual, erect and magnified

C) Real, inverted and magnified

D) Virtual, erect and diminished

#13. A calibrated potentiometer is used to measure the e.m.f. of a cell because the Options

A) internal resistance of a cell is small compared with that of the potentiometer

B) potentiometer has a linear scale

C ) potentiometer takes no current from the cell

D) resistance of the potentiometer is less than that of a voltmeter

#14. The electrochemical equivalent of silver is 0.0012gC-1. If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5.0mins, the current must be

A) 6000A

B) 100A

C) 10A

D) 1A

#15. When a radiation strikes a metal surface, electrons may be ejected from the metal. The maximum kinetic energy which may be acquired by an ejected electron depend on the

A) intensity of the radiation

B) source of the radiation

C) wavelength of the radiation

D) detection device of the electron

#16. Which of the following is TRUE of the particles emitted in radioactive disintegration?

A) the alpha particle is the helium nucleus H

B) the alpha particle is lighter than the beta particle

C) the alpha particle is deflected more than the beta particle in a magnetic field

D) the beta particle is deflected more than the alpha particle in a magnetic field

#17. Two insulated charged spheres of different sizes and carrying opposite charges are connected together by a metallic conductor. Current will flow from one sphere to the other until both sphere

A) carry the same magnitude and sign of charge

B) are at the same potential

C) are at the same temperature

D) are of the same size

#18. When a number of identical small magnets are arranged in a line, the strength of the resultant magnet

A) is largest when they are arranged end to end

B) is greatest when they are arrangedparallel with like poles adjacent to each other

C) depends only on the number of magnets provided they arev parallel

D) is greater when the magnets are arranged on a wooden surface than on a metaln surface

#19. A bar magnet is most effectively demagnetized by

A) placing it in a N - 5 position and hitting it with a hammer

B) subjecting it to an electric current from a battery

C) bringing its north pole in contact with the north pole of a very strong magnet

D) heating the magnet

#20. The plane mirrors in a kaleidoscope are usually placed

A) at an angle of 60o

B) parallel to one another

C) perpendicular to one another

D) at an angle of 45o

#21. A far sighted person cannot see objects that are less than 100cm away. If this person wants to read a book at 25cm, what type and focal length of lens does he need?

A) convex, 20cm

B) concave, 20cm

C) convex, 33cm

D) concave, 33cm

#22. When a yellow card is observed through blue glass, the card would appear

A) black

B) green

C) red

D) white

#23. Dispersion of light by a glass prism is due to the

A) different colours of the glass

B) different speeds of the various colours in glass

C) defects in the glass

D) high density of glass

#24. Which of the following pairs is NOT part of the electromagnetic spectrum? i. Radio waves. ii. Beta rays. iii. Gamma rays. iv. Alpha rays

A) i and ii

B) iii and iv

C) i and ii

D) ii and iv

#25. A vibrator of frequency 60Hz is used in generating transverse stationary waves in a long thin wire, If the average distance between successive nodes on the wire is 45cm, find the speed of the transverse waves in the wire.

A) 27ms-1

B) 54ms-1

C) 90ms-1

D) 108ms-1

#26. In a sound wave in air, the adjacent rarefactions and compressions are separated by a distance of 17cm. If the velocity of the sound wave is 340ms-1. Determine the frequency

A) 10Hz

B) 20Hz

C) 1000Hz

D) 5780Hz

#27. Light of wavelength 5000 x 10-8cm travels in free space with a velocity of 3 x 108ms-1. What is its wavelength in glass of refractive index 1.5?

A) 3333 x 10-8cm

B) 5000 x 10-8cm

C) 6666 x10-8cm

D) 750010-8cm

#28. The pressure on the gas of constant gas thermometer at the ice point is 325mm of mercury and at the steam point is 875mm of mercury. Find the temperature when the pressure of the gas is 190mm of mercury

A) 30k

B) 243k

C) 300k

D) 3003k

#29. A column of air 10.0cm long is trapped in a tube at 27oC. What is the length of the volume at 100oC?

A) 12.4cm

B) 13.7cm

C) 18.5cm

D) 37.0cm

#30. A mass of gas at 7oC and 70cm of mercury has a volume of 1200cm3. Determine its volume at 27oC and pressure of 75cm of mercury.

A) 1200cm3

B) 1378cm3

C) 4320cm3

D) 4629cm3

#31. An electric heater is used to melt a block of ice of mass 1.5kg. If the heater is powered by a 12V battery and a current of 20A flows through the coil, calculate the time taken to melt the block of ice at 0oC. [specific latent heat of fusion of ice = 336 x 103Jkg-1]

A) 76.0min

B) 35.0min

C) 21.0min

D) 2.9min

#32. From the kinetic theory of gases, temperature is a

A) form of energy and is proportional to the total kinetic energy of the molecules

B) form of energy and is proportional to the average kinetic energy of the molecules

C) physical property and is proportional to the total kinetic energy of the molecules

D) physical property and is proportional to the average kinetic energy of the molecules

#33. Two points on a velocity time-graph have coordinates (5s, 10ms-1) and (20s, 20ms-1). Calculate the mean acceleration between the two points

A) 0.67ms-1

B) 0.83ms-1

C) 1.50ms-1

D) 2.00ms-1

#34. A thin film of liquid is trapped between two glass plates. The force required to pull the plates apart will increase if the

A) surface tension of the liquid is reduced

B) perpendicular distance between the plates is increased

C) area of the liquid surface in contact with the plates is increased

D) pressure of the air is decreased

#35. A block-and-tackle system is used to lift a load of 20N through a vertical height of 10m. if the efficiency of the system is 40%, how much work is done against friction?

A) 80J

B) 120J

C) 300J

D) 500J

#36. Which of the following devices are used to measure pressure? i. Aneroid barometer. ii. hydrometer. iii. hygrometer. iv. manometer.

A) i and iii

B) ii and iii

C) iii and iv

D) i and iv

#37. A piece of wood of mass 40g and uniform cross-sectional area of 2cm2 floats upright in water. The length of the wood immersed is

A) 30cm

B) 40cm

C) 20cm

D) 2cm

#38. Which of the following is a set of vectors?

A) force, mass and moment

B) acceleration, velocity and moment

C) mass, weight and density

D) mass, volume and density

#39. In the clinical thermometer, the function of the kink is to i. Prevent the back flow of mercury after use. ii. Ensure the back flow of mercury after use. iii. Maintain the thermometric property of mercury. iv. Allow the temperature attained to be read.

A) i only

B) i and ii only

C) i and iv only

D) iii and iv only

#40. Which of the following surfaces will radiate heat energy best?

A) Red surface

B) white surface

C) black surface

D) yellow surface

#41. Which of the following is a stringed instrument?

A) Flute

B) Trumpet

C) Piano

D) Drum

E) Organ

#42. Which of the transitions will produce the emission of highest frequency?

A) V

B) IV

C) III

D) II

#43. Which of the following instruments can be used to compare the relative magnitude of similar charges on two given bodies?

A) Electrophorus

B) Ebonite rod

C) Proof plane

D) Gold-leaf electroscope

E) Capacitor

#44. Which of the following is a derived unit?

A) Ampere

B) Kilogramme

C) Second

D) Ohm

E) Kelvin

#45. Which of the following is not a property of longitudinal waves?

A) compression

B) reflection

C) refraction

D) polarization

E) diffraction

#46. What is the gravitational potential due to a molecule of mass, m and at a distance, r from it? (G = gravitational constant).

A) Gm2/r2

B) Gm/r

C) Gm2/r

D) G2m2/r

E) m2/Gr2

#47. Calculate the escape velocity for a rocket fired from the earth's surface at a point where the acceleration due to gravity is 10ms-2 and the radius of the earth is 6 x 106m.

A) 7.8 x 106ms-12

B) 1.1 x 104ms-1

C) 3.5 x 107ms-1

D) 6.0 x 107 ms-1

E) 1.2 x 108ms2-1

#48. The electric force between two point charges each of the magnitude, q at a distance of r apart in air of permittivity is:

A) q2/4πεr

B) rε0/q2

C) 4πq/ε0

D) qr2/ε0

E) qε0/4πε0r2

#49. The distance between a node and an anti-node for a transverse wave is equal to

A) the wavelength

B) thrice the wavelength

C) one-half of the wavelength

D) one-quater of the wavelength

E) three quaters of the wavelength

#50. A sound pulse sent vertically downwards into the earth is reflected from two different layers of the earth such that echoes are heard 1.2s and 1.4s. Assuming speed of the pulse is 2000ms-1, calculate the distance between the layers.

A) 200 m

B) 400 m

C) 2400 m

D) 2600 m

E) 2800 m

#51. A ray of light is incidence on a plane mirror at an angle of 35o. What is the angle by the reflected ray with the surface of the mirror?

A) 125o

B) 70o

C) 65o

D) 55o

E) 35o

#52. The refractive index of a given transparent medium is 1.4. Which of the following is the minimum internal angle for total internal reflection to take place in the medium?

A) 30o

B) 36o

C) 44o

D) 46o

E) 54o

#53. Water in an open container boils at a lower temperature when heated at the top of a mountain than at sea-level because at the top of a mountain the

A) relative humidity is higher than at sea-level

B) rays of the sun adds more heat to the water

C) temperature is lower than that at sea-level

D) pressure is lower than that at sea-level

E) pressure is more than that at sea-level

#54. Which of the following substance is not a good conductor of electricity?

A) Human body

B) Glass

C) Aluminium

D) Earth

E) Copper

#55. A block of ice at its melting point is left on a table in the atmosphere and observed to melt gradually. Which of the following statements is true about the melting process?

A) the reaction force of the table on the ice breaks the ice into water molecules

B) heat extracted from the ice block makes the ice block cold

C) the ice block absorbs heat from the atmosphere and its temperature rises

D) the atmosphere absorbs heat from the ice block and its temperature falls

E) the ice block absorbs heat from the atmosphere and its temperature remains constant as it melts

#56. An engine raises 1000kg of water through a height of 60m in 20s. What is the power of the engine? (Take g = 10ms-2>).

A) 120,000 W

B) 30,000 W

C) 333 W

D) 300 W

E) 30 W

#57. A thermometer has its stem marked in millimeter instead of degree Celsius. The lower fixed point is 30mm and the upper is 180mm. Calculate the temperature in degree celsius when the thermometer reads 45mm.

A) 67.5oC

B) 30.0oC

C) 25.0oC

D) 15.0oC

E) 10.0oC

#58. Which of the following is used to determine the relative density of the acid in a car battery?

A) Hypsometer

B) Hygrometer

C) Manometer

D) Hydrometer

E) Spectrometer

#59. A block of material of volume 20cm-3 and density 2.5gcm-3 is suspended from a spring balance with half the volume immersed in water. What is the reading of the spring balance? (Density of water = 1.0gcm-3).

A) 8g

B) 25g

C) 30g

D) 40g

E) 50g

#60. A piece of cork floating on water is acted upon by the forces of...

A) Weight and viscosity

B) weight and upthrust

C) upthrust and viscosity

D) weight only

E) upthrust only

#61. A stone tied to a string is made to revolve in a horizontal circle of radius 4m with an angular speed of 2 rad per sec. With what tangential velocity will the stone move off the circle if the string is cut?

A) 16.0 ms-1

B) 8.0 ms-1

C) 6.0 ms-1

D) 2.0 ms-1

E) 0.5 ms-1

#62. The motion of the prongs of the sounding tuning fork is

A) random

B) translational

C) rotational

D) vibratory

E) vibratory and rotational

#63. Which of the following is NOT a vector quantity?

A) momentum

B) force

C) velocity

D) temperature

E) displacement

#64. Which of the following is not a consequence of a force field?

A) wieght

B) surface tension

C) gravitational pull

D) magnetic force

E) electric force

#65. A boy pulls a nail from the wall with a string tied to the nail. The string is inclined at an angle of 60o to the wall. If the tension in the string is 4N, what is the effective force used in pulling the nail?

A) 2√3 N

B) 4 N

C) 4√3 N

D) 8 N

E) 2 N

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Physics Past Questions v13 for (JAMB/WAEC/NECO)

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Physics Past Questions v13 for (JAMB/WAEC/NECO)

Results

#1. A beam of radiation is passed between a pair of charged plates as indicated in the fig above. Beam P is undetected While Q is deflected to the left. P and Q respectively should be I.γ-rays β-rays II. x-rays β-rays III. γ-rays x-rays IV. x-rays x-rays

#2. The air column as shown above is set into vibration by the turning fork. In this State of resonance, the waves in the air column will be

#3. In the above circuit diagrams A is the ammeter and V is the Voltmeter. Which of the circuits is correct for finding the correct value of the resistance R

#4. Three 2-µF capacitors are arranged as seen in the circuit above . The effective capacitance between E and F is

#5. The total power drawn from the cell in the circuit above is Note: The cell voltage is 12V and all three resistors are 4 ohm resistors.

#6. The figure above shows a conductor PQ carrying a current I in the direction shown. At a particular position near the conductor is a compass needle K. Neglecting the earth's magnetic field, the compass needle will

#7. The figure above shows a uniform circular object, center R and diameter PS. A circular section 6 and Diameter PR is cut from it. if PQRS is a straight line, where is center of gravity of the figure

#8. A simple pendulum of mass m moves along an arc pf a circle radius R in a vertical plane as shown above. What is the work done by gravity in a downward swing through the angle q to 0 degree

#9. A block of mass m is held in equilibrium against a vertical wall by a horizontal force. If the coefficient of friction between the wall and the block is µ, the minimum value of the horizontal force is

#10. In the figure above W1 = 200g, and W2 =450g . Calculate the extension of the spring per unit load? [g = 10ms-2]

#11. The function of a 5-A fuse included in a circuit supplying a household refrigerator with power is to keep the

#12. An object is placed at 5.6 x 10-4m in front of a converging lens of focal length 1.0 x 10-nm. The image formed is

#13. A calibrated potentiometer is used to measure the e.m.f. of a cell because the Options

#14. The electrochemical equivalent of silver is 0.0012gC-1. If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5.0mins, the current must be

#15. When a radiation strikes a metal surface, electrons may be ejected from the metal. The maximum kinetic energy which may be acquired by an ejected electron depend on the

#16. Which of the following is TRUE of the particles emitted in radioactive disintegration?

#17. Two insulated charged spheres of different sizes and carrying opposite charges are connected together by a metallic conductor. Current will flow from one sphere to the other until both sphere

#18. When a number of identical small magnets are arranged in a line, the strength of the resultant magnet

#19. A bar magnet is most effectively demagnetized by

#20. The plane mirrors in a kaleidoscope are usually placed

#21. A far sighted person cannot see objects that are less than 100cm away. If this person wants to read a book at 25cm, what type and focal length of lens does he need?

#22. When a yellow card is observed through blue glass, the card would appear

#23. Dispersion of light by a glass prism is due to the

#24. Which of the following pairs is NOT part of the electromagnetic spectrum? i. Radio waves. ii. Beta rays. iii. Gamma rays. iv. Alpha rays

#25. A vibrator of frequency 60Hz is used in generating transverse stationary waves in a long thin wire, If the average distance between successive nodes on the wire is 45cm, find the speed of the transverse waves in the wire.

#26. In a sound wave in air, the adjacent rarefactions and compressions are separated by a distance of 17cm. If the velocity of the sound wave is 340ms-1. Determine the frequency

#27. Light of wavelength 5000 x 10-8cm travels in free space with a velocity of 3 x 108ms-1. What is its wavelength in glass of refractive index 1.5?

#28. The pressure on the gas of constant gas thermometer at the ice point is 325mm of mercury and at the steam point is 875mm of mercury. Find the temperature when the pressure of the gas is 190mm of mercury

#29. A column of air 10.0cm long is trapped in a tube at 27oC. What is the length of the volume at 100oC?

#30. A mass of gas at 7oC and 70cm of mercury has a volume of 1200cm3. Determine its volume at 27oC and pressure of 75cm of mercury.

#31. An electric heater is used to melt a block of ice of mass 1.5kg. If the heater is powered by a 12V battery and a current of 20A flows through the coil, calculate the time taken to melt the block of ice at 0oC. [specific latent heat of fusion of ice = 336 x 103Jkg-1]

#32. From the kinetic theory of gases, temperature is a

#33. Two points on a velocity time-graph have coordinates (5s, 10ms-1) and (20s, 20ms-1). Calculate the mean acceleration between the two points

#34. A thin film of liquid is trapped between two glass plates. The force required to pull the plates apart will increase if the

#35. A block-and-tackle system is used to lift a load of 20N through a vertical height of 10m. if the efficiency of the system is 40%, how much work is done against friction?

#36. Which of the following devices are used to measure pressure? i. Aneroid barometer. ii. hydrometer. iii. hygrometer. iv. manometer.

#37. A piece of wood of mass 40g and uniform cross-sectional area of 2cm2 floats upright in water. The length of the wood immersed is

#38. Which of the following is a set of vectors?

#39. In the clinical thermometer, the function of the kink is to i. Prevent the back flow of mercury after use. ii. Ensure the back flow of mercury after use. iii. Maintain the thermometric property of mercury. iv. Allow the temperature attained to be read.

#40. Which of the following surfaces will radiate heat energy best?

#41. Which of the following is a stringed instrument?

#42. Which of the transitions will produce the emission of highest frequency?

#43. Which of the following instruments can be used to compare the relative magnitude of similar charges on two given bodies?

#44. Which of the following is a derived unit?

#45. Which of the following is not a property of longitudinal waves?

#46. What is the gravitational potential due to a molecule of mass, m and at a distance, r from it? (G = gravitational constant).

#47. Calculate the escape velocity for a rocket fired from the earth's surface at a point where the acceleration due to gravity is 10ms-2 and the radius of the earth is 6 x 106m.

#48. The electric force between two point charges each of the magnitude, q at a distance of r apart in air of permittivity is:

#49. The distance between a node and an anti-node for a transverse wave is equal to

#50. A sound pulse sent vertically downwards into the earth is reflected from two different layers of the earth such that echoes are heard 1.2s and 1.4s. Assuming speed of the pulse is 2000ms-1, calculate the distance between the layers.

#51. A ray of light is incidence on a plane mirror at an angle of 35o. What is the angle by the reflected ray with the surface of the mirror?

#52. The refractive index of a given transparent medium is 1.4. Which of the following is the minimum internal angle for total internal reflection to take place in the medium?

#53. Water in an open container boils at a lower temperature when heated at the top of a mountain than at sea-level because at the top of a mountain the

#54. Which of the following substance is not a good conductor of electricity?

#55. A block of ice at its melting point is left on a table in the atmosphere and observed to melt gradually. Which of the following statements is true about the melting process?

#56. An engine raises 1000kg of water through a height of 60m in 20s. What is the power of the engine? (Take g = 10ms-2>).

#57. A thermometer has its stem marked in millimeter instead of degree Celsius. The lower fixed point is 30mm and the upper is 180mm. Calculate the temperature in degree celsius when the thermometer reads 45mm.

#58. Which of the following is used to determine the relative density of the acid in a car battery?

#59. A block of material of volume 20cm-3 and density 2.5gcm-3 is suspended from a spring balance with half the volume immersed in water. What is the reading of the spring balance? (Density of water = 1.0gcm-3).

#60. A piece of cork floating on water is acted upon by the forces of...

#61. A stone tied to a string is made to revolve in a horizontal circle of radius 4m with an angular speed of 2 rad per sec. With what tangential velocity will the stone move off the circle if the string is cut?

#62. The motion of the prongs of the sounding tuning fork is

#63. Which of the following is NOT a vector quantity?

#64. Which of the following is not a consequence of a force field?

#65. A boy pulls a nail from the wall with a string tied to the nail. The string is inclined at an angle of 60o to the wall. If the tension in the string is 4N, what is the effective force used in pulling the nail?

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