Physics Past Questions v18 for (JAMB/WAEC/NECO)

Physics Past Questions v18 For (JAMB/WAEC/NECO); These Physics past questions are for students who are sitting for the following examinations

JAMB
Post-UTME / Post-JAMB
WAEC
NECO
WAEC GCE
NECO GCE
NABTEB
NABTEB GCE

Physics Past Questions v18 For (JAMB/WAEC/NECO)

Results

A) electrical energy to chemical energy

B) electrical energy to heat energy

C) electrical energy to mechanical energy

D) mechanical energy to electrical energy

E) mechanical energy to light energy

E) 25.0 ms-2

C) I and III only

D) II and III only

E) I, II and III

A) intensity of the incident radiation

B) time duration of the incident radiation

C) temperature of the incident radiation

D) frequency of the incident radiation

C) i and ii only

D) ii and iii only

C) ii and iii

D) ii and iv

A) a step-up transformer

B) a d.c. generator

C) a wattmeter

D) an induction coil

C) i and iii only

D) ii and iii only

B) ii and iii only

C) i and ii only

D) i, ii, and iii.

A) conductor is magnetized

B) magnetic field of the current interacts with external magnetic field

C) force is due to the motor principle

D) electric field of the current interacts with the external magnetic field

A) local actions

B) polarization

D) degradation

B) ii and iii only

C) i and iii only

D) i, ii, and iii only

B) virteous humour

D) ciliary muscles

A) High velocity sound waves

B) Ultrasonic waves

C) Acoustic waves

D) Infra-red waves

A) 6.0 x 102ms-1

B) 1.2 x 103km

C) 3.0 x 103km

D) 6.0 x 10 5km

A) 9 x 104NM-2

B) 4 x 104NM-2

C) 3 x 104NM-2

D) 2 x 104NM-2

A) e.m.f. changes with temperature

B) resistance changes with temperature

C) volume changes with temperature

D) pressure changes with resistance

A) 2.0 x 102K-1

B) 2.0 x 102K-1

C) 5.0 x 10-3K-1

D) 2.0 x 10-5K-1

A) remains constant

B) increases by a factor of 4

C) increases by a factor of 3

D) decreases by a factor of 4

A) 2.5 x 107N

B) 5.0 x 104N

C) 5.0 x 102N

D) 2.0 x 10-3N

A) 0.60Nkg-1

B) 1.67Nkg-1

C) 6.12 x 102Nkg-1

A) Electrical \(\to\) mechanical \(\to\) potential

B) potential \(\to\)mechanical \(\to\)electrical \(\to\) light

C) mechanical \(\to\) sound \(\to\) electrical \(\to\) light

D) kinetic \(\to\) mechanical \(\to\) electrical \(\to\)light

A) tan\(\theta\) = \(\frac{1}{10}\)

B) cot\(\theta\) = \(\frac{1}{10}\)

C) cos\(\theta\) = \(\frac{1}{10}\)

D) sin\(\theta\) = \(\frac{1}{10}\)

A) Force x time

B) Force x distance

C) Force x acceleration

D) Force x velocity

D) ii and iii only

A) diminished, virtual and inverted

B) diminished, virtual and errect

C) diminished inverted and real

D) magnidied, virtual and errect

E) magnified, real and inverted

A) Carbondioxide gas

B) Liquid sodium metal

C) Concrete shield

D) Graphite rods

E) Boron rods

A) Carbondioxide gas

B) Liquid sodium metal

C) Concrete shield

D) Graphite rods

E) Boron rods

C) Gamma rays

D) Beta particles

E) Alpha particles

A) Alpha particle

B) Beta particle

C) Gamma ray

E) radiating

A) Energy of the photons

B) Maximum Kinetic energy of the ejected electrons

C) Threshold frequency of the photons

D) Stopping potential of the electrons

E) Velocity of the electrons

A) electrical energy into chemical energy

B) electrical energy into heat energy

C) kinetic energy into potential energy

D) electrical energy into mechanical energy

E) mechanical energy into light energy

A) decrease the e.m.f. of the cell

B) prevent local action in the cell

C) prevent polarization in the cell

D) increase the density of the electrolyte

E) increase the resistance of the cell.

A) mechanical energy

B) solar energy

C) heat energy

D) magnetic energy

E) chemical energy.

A) Human body

B) 2Io Vosin wt

C) (Io Vo)/2

D) Io Vo sin2wt

C) 10-5 Vm-1

A) Beta rays

B) Alpha rays

C) Gamma rays

D) Electrons

A) 8.00 x 106ms-1

B) 1.13 x104ms-1

C) 3.58x102ms-1

D) 5.59 x10-2ms-1

E) 3.95x10-2ms-1

E) Sonometer

A) III, II, I and IV

B) II, I, III and IV

C) III, IV II and I

D) II, III, IV and I

E) III, IV, I and II.

A) Infra-red rays

B) Gamma rays

D) Ultra-violet rays

E) Radio waves

A) Both of them are associated with energy transfer

B) Both of them need material media for propagation

C) they are both longitudinal waves

D) their velocities in air are equal

E) Both of them can be polarized

A) pitch of the note

B) tension of the string

C) material of the string

D) presence of overtones

E) thickness of the string

A) fire alarm system

B) thermostat

C) riveting of steel plates

D) balance wheel of a watch

E) fitting of wheels on rims.

A) I and II only

B) I and IV only

C) II and III only

D) III and IV only

E) I and III only

A) diffracted

B) retracted

C) polarized

D) reflected

E) superposed

A) M1 U/M1 + M2

B) M2 U/M1 + M2

C) M1 + M2/M1 U

D) M1 - M2/M1 U

E) M1 U/M1 - M2

A) increases for a while and then decreases

B) decreases for a while and then increases

C) increases gradually

D) decreases gradually

E) remains the same

A) I,II and III only

B) I, II and IV only

C) I, III and IV only

D) II, III and IV only

E) l and IV only.

A) The electrophorous

B) Ebonite rod

C) Proof plane

D) Gold leaf electroscope

E) Capacitor

A) petrol tanker is balanced on the wheel

B) heat generated by friction in the engine can be conducted to the floor

C) charges generated by friction in the tanker can be conducted to the earth

D) the tanker moves slowly as the chain touches the floor

E) chain produces sound for the resonance of the tanker engine

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Physics Past Questions v18 for (JAMB/WAEC/NECO)

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Physics Past Questions v18 for (JAMB/WAEC/NECO)

Results

#1. An electric motor primary converts

#2. A body moves along a circular path with uniform angular speed of 0.6 rad s-1 and at a constant speed of 3.0 ms-1. Calculate the acceleration of the body towards the centre of the circle.

#3. A man stands in front f a high wall and produces a sound. If he receives the echo of the sound four seconds later, what is his distance from the wall? [The speed of sound in air is 330ms-1]

#4. Notes of the same frequency sounded on a piano and on a flute may differ inI. pitch II. quality III. Loudness

#5. The current I in the fig above is

#6. In the network shown above, determine the potential difference across the 5µF capacitor

#7. The diagram above shows a velocity time graph representing the motion of a car. Find the total distance covered during the acceleration and retardation of the motion

#8. In the figure above, a lever of length 200m is used to lift a load of mass 180kg. The pivot at P is 20m from the load. what minimum force F must be applied at the end of the lever [g = 10ms-2]

#9. The kinetic theory of photoelectron liberated from a metallic surface depends on the

#10. Which of the following statements correctly describe(s) cathode rays? i. they consist of tiny particles carrying negative electric charges. ii. they are deflected in a magnetic field but not in an electric field. iii. they consist of fast moving neutrons and deflected in an electric field.

#11. Which of the following are produced after a nuclear fusion process? i. one heavy nucleus. ii. neutrons-1. iii. protons. iv. Energy.

#12. A current of 100mA passes through a conductor for 2 minutes. The quantity of electricity transported is

#13. Which of the following devices may be used to step up the voltage in a d.c. circuit?

#14. Which of the following correctly explain(s) why a green leaf appears green in bright day light? i. it absorbs only the green component of sunlight. ii. it absorbs all colour of sunlight except green. iii. it reflects only the green component of sunlight.

#15. Which of the following correctly explains why soft iron is proffered to steel in electromagnets? i. soft iron is more readily magnetized than steel. ii. soft iron is more readily demagnetized than steel. iii. soft iron retains magnetism more than steel.

#16. A current carrying conductor experiences a force when placed in a magnetic field because the

#17. A simple cell with mercury-amalgamated zinc electrode prevents

#18. If the focal length of a camera lens is 20cm, the distance from the film at which the lens must be set to produce a sharp image of an object 100cm away is

#20. The property of the eye known as its power of accommodation is controlled by the

#21. 200g of water at 90oC is mixed with 100g of water at 30oC. What is the final temperature?

#22. Determine the distance between the consecutive antinodes XX if the wavelength is 66cm

#23. Which of the following waves can propagate through a vacuum?

#24. Radio waves emitted from an antenna are picked up by a radar after reflection from an aircraft in 4 x 10-3S. How far is the aircraft from the antenna? [c = 3 x 108ms-1 ]

#25. A weightless vessel of dimensions 4m x 3m x 2m is filled with a liquid of density 1000kgm-3 and sealed. What is the maximum pressure this container can exert on a flat surface? [g = 10ms-2]

#26. An object of mass 400g and density 600kgm-3 is suspended with a sting so that half of it is immersed in paraffin of density 900kgm-3. The tension in the string is

#27. The thermometric properties of the thermocouple is that is

#28. A metal rod 800mm long is heated from 10oC to 95oC. If it expands by 1.36mm, the linear expansivity of the metal is

#29. When the volume of a given mass of gas is halved and its temperature doubled, the pressure

#30. A rocket burns fuel at the rate of 10kgs-1 and ejects it with velocity of 5 x 103ms-1. The thrust exerted by the gas on the rock is

#31. The force experienced by an object of mass 60.0kg in the moon's gravitational field is 1.002 x 102N. What is the intensity of the gravitational field?

#32. Which of the following correctly describes the energy changes in the generation of light by a hydroelectric power station?

#33. A plane inclined at angle \(\theta\) has a velocity ratio of 10 : 1. The inclination of the plane to the horizontal is given by

#34. Which of the following quantities has the same unit as the watt?

#35. The external and internal diameter of a tube are measured as (32 ± 2)mm and (21 ± 1)mm respectively. Determine the percentage error in the thickness of the tube.

#36. The following properties of a solid are measured on earth i. weight ii. specific heat capacity iii. density. Which of the properties will hav a different value if measured in space?

#37. Three identical lamps each power 100W are connected in parallel across a potential difference of 250V. Calculate the current in the circuit

#38. The images formed by diverging lenses are always

#39. Which of the following is used in a nuclear reactor to slow down fast-moving neutrons?

#40. Which of the following is used in a nuclear reactor to slow down fast-moving neutrons?

#41. Which of the following are emitted from a radioactive substance without altering either the nucleon number or the proton number of the substance?

#42. Which of the following is not a product of nuclear fission?

#43. Eight or - particles and size B - particles are emitted from an atom of 92238U before it achieves stability. What is the nucleon number of the final product in the chain reaction?

#44. When an atom is in the ground state, it is said to be

#45. lf Einstein’s photoelectric equation is represented by hf - W = Φ where h is Planck’s constant, f the frequency of incident radiation and W the work function of the material, what does the symbol Φ up stand for?

#46. ln the diagram below, the galvanometer indicates a null-deflection. What is the potential difference between P and Q?

#47. When a potential difference, V is applied across the ends of a resistor of resistance, R a Current, l passes through the resistor. The heat generated in the resistor in time, t is given by the expression

#48. Electric motor primarily converts

#49. What amount of current would pass through a 10 Ω coil if it takes 21s for the coil to just melt a lump of ice of mass 10g at 0oC if there are no heat losses? (Latent heat of fusion of ice = 336 Jg-1).

#50. How long does it take a 750 W heater operating at full rating to raise the temperature of 1 kg of water from 40oC to 70oC? (Take the specific heat capacity of water as 4200 J kg-1 K-1 and neglect heat losses).

#51. The function of the magnanese (IV) oxide in a leclanche cell is to

#52. Electrical resistance is the property of an electrical conductor that causes electrical energy to be converted into

#53. Calculate the current, I in the diagram shown above. (Neglect the internal resistance of the cell)

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

#55. In a purely resistive a.c. circuit, the current I = Io sin wt and voltage, V = Vo sin wt. Calculate the instantaneous power dissipated in the circuit in time t.

#56. A point charge of 1.0 x 10-7 C experiences force of 0.01 N in a uniform electric field. Calculate the magnitude of the strength of the field

#57. The potential difference between two points A and B situated at a distance d apart is V. Which of the following expresses the magnitude of the electric field intensity between the two points assuming the field is uniform?

#58. Which of the following have the greatest penetrating power?

#59. A particle of charge 5C moves perpendicularly to a magnetic Held of magnitude C.01 T. If the velocity of the charge is 1.5ms'2, calculate the magnitude of the force exerted on the particle

#60. A household refrigerator consumes electrical energy at the rate of 200 W. lf electricity costs 5 k per kWh, calculate the cost of operating the appliance for 30 days.

#61. Calculate the escape velocity of a satellite launched from the earth’s surface (Take g as 10ms-2 and the radius of the earth as 6.4 x 106m)

#62. What is the gravitational potential due to a point mass m at a distance from it? (G = gravitational constant)

#63. In a series R - C circuit, the resistance of the resistor is 4 Ω and capacitive reactance is 3 Ω. Calculate the impedance of the circuit

#64. The vector diagram shown below represents the resistance R, the capacitive reactance Xc, the inductive reactance Xc and the impedance, Z in an R-L-C circuit. The current in the circuit will be maximum when

#65. Which of the following is a percussion instrument?

#66. Which of the following indicates the correct sequence of steps taken in charging a gold-leaf electroscope by induction? l. Removing the ebonite rod ll. Bringing a negatively charged ebonite rod close to the cap III. Earthing the cap IV. Disconnecting the earthing

#67. In a ripple tank experiment, a vibrating plate is used to generate ripples in the water. If the distance between two successive troughs is 3.5 cm and the wave travels a distance of 31.5 cm in 1.5 s, calculate the frequency of the vibrator

#68. Which of the following have the longest wavelengths?

#69. A man stands in front of a tall wall and produces a sound. If he receives the echo of the sound two seconds later, calculate his distance from the wall. (The speed of sound in air is 330ms-1)

#70. Which of the following is correct about light and sound waves?

#71. The quality of a note produced by a vibrating string is determined by the

#72. An image which cannot be formed on a screen is said to be

#73. The expansion of solids can be considered a disadvantage in the

#74. A solid metal cube of side 10 cm is heated from 10oC to 60oC. lf the linear expansivity of the metal is 1.2 x 105K-1, calculate the increase in its volume.

#75. A gas has a volume of 546 cm3 at OoC. What is the volume of the gas at- 100oC if its pressure remains constant?

#77. Longitudinal waves cannot be

#78. A particle starts from rest and moves with a constant acceleration of 0.5 ms-2? Calculate the time taken by the particle to cover a distance of 25m.