## Physics 2018 Past Questions | JAMB

Study the following Physics past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.

41. The inner diameter of a small test tube can be measured accurately using a

• A. Micrometres screw gauge
• B. Pair of dividers
• C. Metre rule
• D. Pair of vernier calliper

42. A pulley system has three pulleys in the fixed block and two in the movable block and if the pulley has an efficiency of 72%, the mechanical advantage of the system is?

• A. 36.0
• B. 7.2
• C. 5.0
• D. 3.6

43. When an atom loses or gain a charge it becomes

• A. An electron
• B. An ion
• C. A neutron
• D. A proton

44. A ball of mass 800g moving horizontally with a speed of 5m/s hits a vertical wall and rebounds with the same speed. The impulse experienced by the ball is?

• A. 0kgm
• B. 2kgm/s
• C. 4kgm/s
• D. 8kgm/s

45.  The force between the molecules of a liquid in contact with that of a solid is?

• B. Cohesive
• C. Magnetic
• D. Repulsive

46. A body of mass 100g moving with a velocity if 10ms-1 collides with a wall. If after collision it moves with a velocity of 2.0ms−1 in the opposite direction, calculate the change in momentum.

• A. 0.8Ns
• B. 1.2Ns
• C. 12.0Ns
• D. 80.0Ns

47. A 20kg mass is to be pulled up a slope inclined at 30° to the horizontal. If efficiency of the plane is 75%. The force required to pull the load up the plane is J [g=10ms2]

• A. 87N
• B. 73.5N
• C. 133.3N
• D. 533.2N

48. The tendency of a body to remain at rest when a force is applied to it is called.

• A. Impulse
• B. Momentum
• C. Inertia
• D. Friction

49. An object is placed 20cm from a concave mirror of focal length 10cm. The linear magnification of the image produced is?

• A. 0
• B.  $\frac{1/}{2}$
• C. 1
• D. 2

50. The energy needed to move a unit positive charge around a complete electric circuit is called the

• A. electromotive force
• B. electric potential difference
• C. electric energy
• D. kinetic energy

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