Physics Past Questions v8 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 v8 (JAMB/WAEC/NECO)

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#1. What is the resistance of the circuit shown above

A) 4Ω

A) 4Ω

B) 11Ω

B) 11Ω

C) 19/5Ω

C) 19/5Ω

D) 17/4Ω

D) 17/4Ω

E) 8Ω

E) 8Ω

#2. A force varying linearly with the distance acts on a body as shown above, The work done on the body by the force during the first 10m of motion is

A) 100J

A) 100J

B) 150J

B) 150J

C) 200J

C) 200J

D) 300J

D) 300J

E) 600J

E) 600J

#3. A short bar magnet is placed in earth's magnetic field, as shown above, which of the points II and III are/is possible positions of a neutral point?A short bar magnet is placed in earth's magnetic field, as shown above, which of the points II and III are/is possible positions of a neutral point? A short bar magnet is placed in earth's magnetic field, as shown above, which of the points II and III are/is possible positions of a neutral point? Options A) I only B) II only C) III only D) I and II E) I,II and IIIA short bar magnet is placed in earth's magnetic field, as shown above, which of the points II and III are/is possible positions of a neutral point?

A) I only

A) I only

B) II only

B) II only

C) III only

C) III only

D) I and II

D) I and II

E) I,II and III

E) I,II and III

#4. In the circuit Shown above, calculate the effective capacitance between X and Y

A) 3/4µF

A) 3/4µF

B) 2 \frac{10}{13} µF

B) 2 \frac{10}{13} µF

C) 12µF

C) 12µF

D) frac{12}{13} µF

D) frac{12}{13} µF

E) 13µF

E) 13µF

#5. In the diagram above, X and Y have resistances 6 and 4 ohms respectively, if the power dissipation in X is 10W then power dissipation in Y is Options

A) 2.4W

A) 2.4W

B) 4

B) 4

C) 6.0W

C) 6.0W

D) 6.7W

D) 6.7W

E) 15.0W

E) 15.0W

#6. What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 kobo per kWh? Options

A) N0.65

A) N0.65

B) N0.13

B) N0.13

C) N3.90

C) N3.90

D) N39.00

D) N39.00

E) N234.00

E) N234.00

#7. Which of the following statements is (are) NOT true about the emission of the photoelectrons from metallic surfaces? i. all metallic surfaces emits the same number of photoelectrons in a given light ii. most metallic surfaces emit the same number of photoelectrons in visible and infra-red light iii. a metallic surface emits photoelectrons only if the frequency of the incident light is higher than its own characteristics threshold frequency

A) i only

A) i only

B) ii only

B) ii only

C) i and ii

C) i and ii

D) ii and iii

D) ii and iii

E) iii only

E) iii only

#8. The spectrum of white light consists of coloured lights arranged in the following order

A) blue, red, green, yellow, indigo, violet, orange

A) blue, red, green, yellow, indigo, violet, orange

B) red, orange, yellow, green, blue, indigo, violet

B) red, orange, yellow, green, blue, indigo, violet

C) red, orange, yellow, indigo, green, blue, violet

C) red, orange, yellow, indigo, green, blue, violet

D) indigo, green, blue, violet, red, orange

D) indigo, green, blue, violet, red, orange

E) yellow, blue, green, violet, orange, indigo, red

E) yellow, blue, green, violet, orange, indigo, red

#9. Cathode rays are

A) high-energy electromagnetic waves

A) high-energy electromagnetic waves

B) protons

B) protons

C) streams of electrons

C) streams of electrons

D) neutrons

D) neutrons

E) radio waves

E) radio waves

#10. A device that converts sound energy into electrical energy is

A) the horn of a motor car

A) the horn of a motor car

B) an A.C. generator

B) an A.C. generator

C) a microphone

C) a microphone

D) the telephone

D) the telephone

E) radio waves

E) radio waves

#11. Which of the following i. -particles ii. protons iii. neutrons iv. -particles. may be found in light nuclei?

A) i and ii

A) i and ii

B) i and iii

B) i and iii

C) ii and iv

C) ii and iv

D) ii and iii

D) ii and iii

E) i, ii and iii

E) i, ii and iii

#12. Radio waves have a velocity of 3 x 108ms-1. A radio station sends out a broadcast on a frequency of 800kHz. The wavelen26.7mgth of the broadcast is

A) 375.0m

A) 375.0m

B) 267.0m

B) 267.0m

C) 240.0m

C) 240.0m

D) 37.5m

D) 37.5m

E) 26.7m

E) 26.7m

#13. A gun of mass 2.0kg fires a bullet of mass 16 x 10 -2kg due East. If the bullet leaves the nozzle of the gun with a velocity of 150ms-1, what is the recoil velocity of the gun?

A) 150ms-1 due West

A) 150ms-1 due West

B) 1.2 x 10-4ms-1 due West

B) 1.2 x 10-4ms-1 due West

C) 1.2ms-1 due West

C) 1.2ms-1 due West

D) 1.2ms-1 due East

D) 1.2ms-1 due East

E) 150ms-1 due East

E) 150ms-1 due East

#14. Which of the following is a correct explanation of the inertia of a body?

A) ability to overcome the earth's gravity

A) ability to overcome the earth's gravity

B) reluctance to stop moving

B) reluctance to stop moving

C) readiness to start moving

C) readiness to start moving

D) reluctance to start moving and its readiness to stop moving once it has begun to move

D) reluctance to start moving and its readiness to stop moving once it has begun to move

E) reluctance to start moving its reluctance to stop moving once it has begun to move

E) reluctance to start moving its reluctance to stop moving once it has begun to move

#15. If a water pump at Kainji Dam is capable of lifting 1000kg of water through a vertical height of 10m in 10s, the power of the pump is [g = 10ms-2]

A) 1.0kW

A) 1.0kW

B) 10.0kW

B) 10.0kW

C) 12.5kW

C) 12.5kW

D) 15.0kW

D) 15.0kW

E) 20.0kW

E) 20.0kW

#16. What is the apparent colour of a RED SHIRT when viewed in PURE green light?

A) Red

A) Red

B) Green

B) Green

C) Yellow

C) Yellow

D) Black

D) Black

E) Blue

E) Blue

#17. A given mass of an ideal gas occupies a volume V at a temperature T and under a pressure p. If the pressure is increased to 2p and the temperature reduced to 1/2T , then the percentage change in the volume of the gas is

A) 0%

A) 0%

B) 25%

B) 25%

C) 75%

C) 75%

D) 300%

D) 300%

E) 400%

E) 400%

#18. Which of the following properties of matter CANNOT be utilized for temperature measurement?

A) length of a liquid column

A) length of a liquid column

B) volume of a gas at constant pressure

B) volume of a gas at constant pressure

C) pressure of a gas at constant volume

C) pressure of a gas at constant volume

D) resistance of a metallic wire

D) resistance of a metallic wire

E) current produced in a photoelectric effect

E) current produced in a photoelectric effect

#19. Which of the following statements about the compound microscope and astronomical telescope is (are) correct? i. the final image of a compound microscope is located at infinity ii. the final image of the astronomical telescope is always erect iii. the objective lens of a compound microscope has a very short focal length

A) i only

A) i only

B) ii only

B) ii only

C) iii only

C) iii only

D) i and iii

D) i and iii

E) ii and iii

E) ii and iii

#20. The electromotive force obtained from a simple dynamo may be increased by

A) increasing the cross-sectional area of the coil

A) increasing the cross-sectional area of the coil

B) winding the coil on a soft-iron armature so as to decrease the

B) winding the coil on a soft-iron armature so as to decrease the

C) increasing the speed of rotation

C) increasing the speed of rotation

D) making the field magnet longer

D) making the field magnet longer

E) using low-resistance copper coilss

E) using low-resistance copper coilss

#21. A body of mass 5kg initially at rest is acted upon by two mutually perpendicular forces 12N and 5N as shown in fig.3. If the particle moves in the direction QA, calculate the magnitude of the acceleration

A) 0.40ms-2

A) 0.40ms-2

B) 1.40ms-2

B) 1.40ms-2

C) 0.26ms-2

C) 0.26ms-2

D) 2.60ms-2

D) 2.60ms-2

E) 3.40ms-2

E) 3.40ms-2

#22. A small steel needle is carefully floated on water in a beaker. When a few drops of kerosine are introduced into the water the needle sink. Which of the following statements correctly explain(s) the observation? i. there is tension on the water surface ii. kerosine reduces the density of water so that needle becomes denser than water iii. kerosine reduces the surface tension of water

A) i only

A) i only

B) ii only

B) ii only

C) iii only

C) iii only

D) i and ii

D) i and ii

E) i and iii

E) i and iii

#23. Which of the following statements describes an atom accurately? i. atoms of all elements are identical ii. an atom contains a nucleus and number of electrons iii. due to the electrons in the atom an atom is negatively charged iv. electrons in the atom move in circular orbits round the nucleus

A) i and ii

A) i and ii

B) ii and iii

B) ii and iii

C) iii and iv

C) iii and iv

D) ii and iv only

D) ii and iv only

E) i,ii and iii

E) i,ii and iii

#24. A particle moves in a circular orbit of radius 0.02m. If the speed of the particle is 0.88ms-1, calculate its frequency in cycles per second

A) 2.0Hz

A) 2.0Hz

B) 7.0Hz

B) 7.0Hz

C) 8.8Hz

C) 8.8Hz

D) 14.0Hz

D) 14.0Hz

E) 17.6Hz

E) 17.6Hz

#25. Heat is supplied uniformly at the rate of 100W to 1.0 x 10-2kg of a liquid for 20 seconds. If the temperature of the liquid rises by 5oC, then the specific heat capacity of the liquid is

A) 2.0 x 102Jkg-1k-1

A) 2.0 x 102Jkg-1k-1

B) 2.0 x 102Jkg-1

B) 2.0 x 102Jkg-1

C) 4.0 x 104Jkg-1k-1

C) 4.0 x 104Jkg-1k-1

D) 4.0 x 104kg-1

D) 4.0 x 104kg-1

E) 8.4 x 103Jkg-1k-1

E) 8.4 x 103Jkg-1k-1

#26. Of two identical tuning forks with natural frequency 256Hz, one is loaded so that 4 beats per second are heard when they are sounded together. What is the frequency of the loaded tuning fork?

A) 260Hz

A) 260Hz

B) 252Hz

B) 252Hz

C) 248Hz

C) 248Hz

D) 264Hz

D) 264Hz

E) 258Hz

E) 258Hz

#27. Dewpoint is the temperature at which, water vapour in the atmosphere

A) turns into steam

A) turns into steam

B) solidifies into ice pellets

B) solidifies into ice pellets

C) first condenses into liquid form

C) first condenses into liquid form

D) is just sufficient to cause cooling

D) is just sufficient to cause cooling

E) has a relative humidity of fifty percent

E) has a relative humidity of fifty percent

#28. The lower and upper fixed points marked on a mecury-in-glass thermometer are 210mm apart. The end of the mercury column in the tube is 49mm above the lower fixed point in a room. What is the temperature of the room in degrees Celsius?

A) 55.3oC

A) 55.3oC

B) 23.3oC

B) 23.3oC

C) 49.0oC

C) 49.0oC

D) 16.1oC

D) 16.1oC

E) 76.7oC

E) 76.7oC

#29. If a solid changes directly into a gas when heat is applied the process is called

A) vaporization

A) vaporization

B) evaporation

B) evaporation

C) sublimation

C) sublimation

D) ionization

D) ionization

E) conversion

E) conversion

#30. A plane inclined at an angle of 30o to the horizontal has an efficiency of 60%. The force parallel to the plane required to push a load of 120N uniformly up the plane is

A) 60N

A) 60N

B) 100N

B) 100N

C) 120N

C) 120N

D) 200N

D) 200N

E) 240N

E) 240N

#31. Which of the following components is NOT contained in a dry cell? A

A) carbon rod

A) carbon rod

B) paste of magnesium dioxide

B) paste of magnesium dioxide

C) paste of ammonium chloride

C) paste of ammonium chloride

D) zinc case

D) zinc case

E) copper rod

E) copper rod

#32. Which of the following can be described as high tension transmission?

A) high resistance and low voltage

A) high resistance and low voltage

B) low current and high voltage

B) low current and high voltage

C) high current and low voltage

C) high current and low voltage

D) high voltage and zero current

D) high voltage and zero current

E) high current and low resistance

E) high current and low resistance

#33. All the heat generated in a 5 resistor by 2A flowing for 30 seconds is used to evaporate 5g of a liquid at its boiling point. Which of the following is the correct value of the specific latent heat of the liquid?

A) 120J

A) 120J

B) 60Jg-1

B) 60Jg-1

C) 120Jg-1

C) 120Jg-1

D) 1500J

D) 1500J

E) 1500Jg-1

E) 1500Jg-1

#34. When vibration occurs in air column, the distance between a node and an antinode is equal to

A) one-quarter of the wavelength

A) one-quarter of the wavelength

B) one-hall of the wavelength

B) one-hall of the wavelength

C) the wave length

C) the wave length

D) twice the wavelength

D) twice the wavelength

E) four-times the wavelength

E) four-times the wavelength

#35. Which of the following statements is (are) NOT correct? i. pressure changes do not affect the speed of sound in air ii. the velocity of sound increases with temperature iii. the quality of the note depends only on its frequency

A) i only

A) i only

B) ii only

B) ii only

C) iii only

C) iii only

D) i and iii

D) i and iii

E) ii and iii

E) ii and iii

#36. For correcting long sight defects in the human eye we require a

A) converging lens

A) converging lens

B) diverging lens

B) diverging lens

C) microscope

C) microscope

D) periscope

D) periscope

E) plain glass sheet

E) plain glass sheet

#37. For a concave mirror to form a teal diminished image, the object must be placed

A) behind the mirror

A) behind the mirror

B) between the mirror and its focus

B) between the mirror and its focus

C) between the focus and the centre of curvature

C) between the focus and the centre of curvature

D) at the centre of curvature

D) at the centre of curvature

E) at a distance greater than the radius of curvature

E) at a distance greater than the radius of curvature

#38. The unit of quantity of electricity is called

A) the ampere

A) the ampere

B) the volts

B) the volts

C) the coulomb

C) the coulomb

D) the ammeter

D) the ammeter

E) electromotive force

E) electromotive force

#39. The resistance of a wire depends on

A) the length of the wire

A) the length of the wire

B) the diameter of the wire

B) the diameter of the wire

C) the temperature of the wire

C) the temperature of the wire

D) the resistivity of the wire

D) the resistivity of the wire

E) all of the above

E) all of the above

#40. The distance travelled by a particle starting from rest is plotted against the square of the time elapsed from the commencement of motion. The resulting graph is linear, the slope of this graph is a measure of

A) initial displacement

A) initial displacement

B) initial velocity

B) initial velocity

C) acceleration

C) acceleration

D) half the acceleration

D) half the acceleration

E) half the initial velocity

E) half the initial velocity

#41. For which of the underlisted quantities is the derived unit ML2T2 correct? i. momentum of a force ii. work iii. acceleration

A) i only

A) i only

B) ii only

B) ii only

C) iii only

C) iii only

D) i and ii

D) i and ii

E) ii and iii

E) ii and iii

#42. What volume of alcohol with a density of 8.4 x 102kgm-3 will have the same mass as 4.2m3of petrol whose density is 7.2 x 102kgm-3?

A) 14m3

A) 14m3

B) 3.6m3

B) 3.6m3

C) 4.9m3

C) 4.9m3

D) 5.0m3

D) 5.0m3

E) 5.8m3

E) 5.8m3

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