Physics Past Questions v38 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 v38 For (JAMB/WAEC/NECO)

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#1. Calculate the effective resistance between P and Q in the diagram above

A) 0.75 omega

A) 0.75 omega

B) 4.00 omega

B) 4.00 omega

C) 5.00 omega

C) 5.00 omega

D) 7.00 omega

D) 7.00 omega

#2. If the air inside a rigid box is heated, the i, average speed of the molecules increases ii. pressure of the air increases iii. average separation of the molecule increases. Which of the statements above are correct?

A) i and ii only

A) i and ii only

B) ii and iii only

B) ii and iii only

C) i and iii only

C) i and iii only

D) i, ii and iii

D) i, ii and iii

#3. Which of the following is/are in random motion? i. Pollen grains in water ii. The molecules of hydrogen gas ii. Fine chalk particles floating in air

A) i and ii only

A) i and ii only

B) i and iii only

B) i and iii only

C) ii and iii only

C) ii and iii only

D) i, ii and iii

D) i, ii and iii

#4. If a gas is excited by high voltage to produce a discharge and the light is examined in a spectrometer

A) an explosion is observed

A) an explosion is observed

B) the rainbow colours are seen

B) the rainbow colours are seen

C) an emission spectrum is observed

C) an emission spectrum is observed

D) dark lines are observed

D) dark lines are observed

#5. The number of protons in an element increased by one after a radioactive decay. The element must have decay by emitting

A) a beta particle

A) a beta particle

B) an alpha particle

B) an alpha particle

C) a gamma ray

C) a gamma ray

D) a neutron

D) a neutron

#6. The correct sequence of energy transformation in the operation of an x-ray tube is i. X-rays ii. Kinetic energy of thermo electrons iii. Potential energy of the target atoms iv. Heat energy of the emitted electrons

A) iv, iii, ii, i

A) iv, iii, ii, i

B) ii, iv, iii, i

B) ii, iv, iii, i

C) iv, ii, iii, i

C) iv, ii, iii, i

D) iii, iv, ii, i

D) iii, iv, ii, i

#7. There is always an uncertainty involved in any attempt to measure the position and momentum of an electron simultaneously. This statement is known as the

A) de Broglie's law

A) de Broglie's law

B) Heisenberg uncertainty principle

B) Heisenberg uncertainty principle

C) Franck-Hertz experimental law

C) Franck-Hertz experimental law

D) wave-particle paradox

D) wave-particle paradox

#8. Which of the following components is used for storing electric charges?

A) inductor

A) inductor

B) resistor

B) resistor

C) capacitor

C) capacitor

D) electrometer

D) electrometer

#9. Which of the following operations does not represent an action of a force field?

A) falling of a mango fruit from the tree

A) falling of a mango fruit from the tree

B) picking of nails using a bar magnet

B) picking of nails using a bar magnet

C) repulsion of two like charges

C) repulsion of two like charges

D) pushing of a wheel-barrow on a level gound

D) pushing of a wheel-barrow on a level gound

#10. A bulb marked 240V, 40W is used for 30 minutes. Calculate the heat generated

A) 320J

A) 320J

B) 400J

B) 400J

C) 10800J

C) 10800J

D) 72000J

D) 72000J

#11. Five 80-W and three 100W are run for 8 hours. If the cost of energy is N5.00 per unit, calculate the cost of running the lamp. [1 unit = 1 kWh]

A) N280.00

A) N280.00

B) N28.00

B) N28.00

C) N7.20

C) N7.20

D) N1.44

D) N1.44

#12. Which of the following electromagnetic wave can be detected by its heating effect?

A) ultraviolet radiation

A) ultraviolet radiation

B) x-rays

B) x-rays

C) gamma rays

C) gamma rays

D) infrared radiation

D) infrared radiation

#13. A sounding tuning fork is brought near the open end of a pipe containing air and the loudness of the sound is observed to increase. This observation is due to

A) an echo

A) an echo

B) resonance

B) resonance

C) interference

C) interference

D) reverbration

D) reverbration

#14. Which of the following statements about sound wave is not correct? Sound waves can be

A) reflected

A) reflected

B) refracted

B) refracted

C) diffracted

C) diffracted

D) polarized

D) polarized

#15. A dry plastic comb used in combing hair was found to attract pieces of paper and dust. The most probable explanation for this phenomenon is that the comb has been given

A) magnetization by induction

A) magnetization by induction

B) electric charges by induction

B) electric charges by induction

C) electric charges by conduction

C) electric charges by conduction

D) electric charges by friction

D) electric charges by friction

#16. Which of the following statements is correct about resonance? Resonance occurs when a body

A) vibrates with its natural frequency

A) vibrates with its natural frequency

B) is forced to vibrate on its own natural frequency by another body at the same vibration

B) is forced to vibrate on its own natural frequency by another body at the same vibration

C) vibrates at the frquency of the body causing the vibration

C) vibrates at the frquency of the body causing the vibration

D) vibrates with an irregular frequency

D) vibrates with an irregular frequency

#17. Which of the following phenomena is not a direct consequence of rectilinear propagation of light?

A) lunar and solar eclipses

A) lunar and solar eclipses

B) images of objects in a pin hole camera

B) images of objects in a pin hole camera

C) diffraction of light

C) diffraction of light

D) shadows of opaque object

D) shadows of opaque object

#18. An object is placed 10cm in front of a plane mirror. If it is moved 8cm away father away from the mirror, determine the distance of the final image from the mirror

A) 2cm

A) 2cm

B) 9cm

B) 9cm

C) 16cm

C) 16cm

D) 18cm

D) 18cm

#19. In which of the following piece of apparatus is the radius of curvature equal to twice the focal length?

A) converging lens

A) converging lens

B) diverging lens

B) diverging lens

C) converging mirror

C) converging mirror

D) parabolic mirror

D) parabolic mirror

#20. When an object is placed at the centre of curvature of a concave mirror, its image is formed at

A) the focus

A) the focus

B) infinity

B) infinity

C) the centre of curvature

C) the centre of curvature

D) a distance twice the radius of curvature

D) a distance twice the radius of curvature

#21. According to the kinetic theory of gasses, which of the following property of a gas can be affected by the collision of the gas molecule with the walls of the container?

A) temperature

A) temperature

B) energy

B) energy

C) viscosity

C) viscosity

D) pressure

D) pressure

#22. The pressure of a fixed mass of an ideal gas at 27oC is 3 pa. The gas is heated at a constant volume until its pressure is 5 pa. Determine the new temperature of the gas.

A) 100oC

A) 100oC

B) 227oC

B) 227oC

C) 273oC

C) 273oC

D) 500oC

D) 500oC

#23. Which of the following wave is electromagnetic?

A) x-rays

A) x-rays

B) sound waves

B) sound waves

C) water waves

C) water waves

D) tidal waves

D) tidal waves

#24. The ice and steam point on a mercury-in-glass thermometer are 10cm and 30cm respectively. Calculate the temperature in decree Celsius when the mercury meniscus is the 14cm mark

A) 20oC

A) 20oC

B) 30oC

B) 30oC

C) 34oC

C) 34oC

D) 70oC

D) 70oC

#25. A relative density bottle of volume 50cm3 is completely filled with a liquid at 30oC. It is then heated to 80oC such that 0.75cm3 of the liquid is expelled. Calculate the apparent cubic expansivity of the liquid.

A) 0.00030k-1

A) 0.00030k-1

B) 0.00032k-1

B) 0.00032k-1

C) 0.01970k-1

C) 0.01970k-1

D) 0.02030k-1

D) 0.02030k-1

#26. An external force of magnitude 100N acts on a particle of mass 0.15kg for 0.03s. Calculate the change in the speed of the particle

A) 50ms-1

A) 50ms-1

B) 25ms-1

B) 25ms-1

C) 20ms-1

C) 20ms-1

D) 5ms-1

D) 5ms-1

#27. A car of mass 800kg moves from rest on a horizontal track and travels 60m in 20s with uniform acceleration. Assuming there were no frictional forces, calculate the accelerating force

A) 240.0N

A) 240.0N

B) 800.0N

B) 800.0N

C) 1600.00N

C) 1600.00N

D) 2400.0N

D) 2400.0N

#28. Mechanical energy can be either

A) kinetic or electric

A) kinetic or electric

B) chemical or potential

B) chemical or potential

C) potential or kinetic

C) potential or kinetic

D) electric or heat

D) electric or heat

#29. An object of mass 2 kg moves with a uniform speed of 10ms-1 for 5s along an straight path. Determine the magnitude of its acceleration

A) 0 ms-2

A) 0 ms-2

B) 1 ms-2

B) 1 ms-2

C) 3 ms-2

C) 3 ms-2

D) 4 ms-2

D) 4 ms-2

#30. The team rectilinear acceleration means the rate of increase of

A) velocity along a circular path in a unit time

A) velocity along a circular path in a unit time

B) distance along a rectangular path in a unit time

B) distance along a rectangular path in a unit time

C) displacement along a straight-line path in a unit time

C) displacement along a straight-line path in a unit time

D) velocity along a straight-line path in a unit time

D) velocity along a straight-line path in a unit time

#31. A body accelerates uniformly from rest at 2ms-2. Calculate the magnitude of its velocity after travelling 9m

A) 4.5 ms-1

A) 4.5 ms-1

B) 6.0ms-1

B) 6.0ms-1

C) 18.0-1

C) 18.0-1

D) 36.0-1

D) 36.0-1

#32. A swinging pendulum between the rest position and its maximum displacement possesses

A) Kinetic energy only

A) Kinetic energy only

B) potential energy only

B) potential energy only

C) gravitational energy only

C) gravitational energy only

D) both kinetic and potential energy

D) both kinetic and potential energy

#33. A liquid of volume 2.00 m3 and density 1.00 x 103 is mixed with 3.00 m3 of another liquid of density 8.00 x 103kg m-3. Calculate the density of the mixture [Assuming there is no chemical reaction]

A) 5.20 x 102 kg m-3

A) 5.20 x 102 kg m-3

B) 1.13 x 103 kg m-3

B) 1.13 x 103 kg m-3

C) 8.80 x 102 kg m-3

C) 8.80 x 102 kg m-3

D) 5.20 x 102 kg m-3

D) 5.20 x 102 kg m-3

#34. A mass of mass m, experiences a viscous drag, F and an upthrust, U as he descends towards the ground at a steady velocity, Using a parachute. If the acceleration of free fall is g, which of the following expressions is correct?

A) FU = mg

A) FU = mg

B) U + F - mg = 0

B) U + F - mg = 0

C) U - F = mg

C) U - F = mg

D) F - U - mg = 0

D) F - U - mg = 0

#35. a body moving at a constant speed accelerates when it is in

A) rectilinear motion

A) rectilinear motion

B) translational motion

B) translational motion

C) circular motion

C) circular motion

D) vibrational motion

D) vibrational motion

#36. Which of the following observations is not an effect of surface tension?

A) droplets of water dripping slowly from a tap

A) droplets of water dripping slowly from a tap

B) mercury spilled on a clean glass plate forms spherical droplets

B) mercury spilled on a clean glass plate forms spherical droplets

C) an indect walking across the surface of a pond

C) an indect walking across the surface of a pond

D) water flowing out more easily then engine oil from a container

D) water flowing out more easily then engine oil from a container

#37. Beta particles are faster-moving

A) protons

A) protons

B) electrons

B) electrons

C) neutrons

C) neutrons

D) photons

D) photons

#38. How much heat is emitted when a body of mass 200g cools from 37oC to 31oC? (specific heat capacity of the body = 0.4Jg-1K-1,)

A) 4800J

A) 4800J

B) 1200J

B) 1200J

C) 480J

C) 480J

D) 202J

D) 202J

E) 80J

E) 80J

#39. A plane inclined at an angle at 30o to the horizontal has an efficiency of 50%. The force parallel to the plane required to push a load of 120 N uniformly up the plane is

A) 40√3N

A) 40√3N

B) 60N

B) 60N

C) 120N

C) 120N

D) 200N

D) 200N

E) 240N

E) 240N

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

A) Red

A) Red

B) White

B) White

C) Black

C) Black

D) Yellow

D) Yellow

E) Blue

E) Blue

#41. From the diagram above, the inductive reactance and the resistance R are respectively

A) 50Ω and 45Ω

A) 50Ω and 45Ω

B) 25Ω and 51Ω

B) 25Ω and 51Ω

C) 20Ω and 50Ω

C) 20Ω and 50Ω

D) 10Ω and 49Ω

D) 10Ω and 49Ω

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