Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 41:

  When the breaks in a car are applied, the frictional force on the tyresis?

  Options:
  A) a disadvantage because it is in the direction of the motion of the car
  B) a disadvantage because it is in the opposite direction of the motion of the car
  C) an advantage because it is in the direction of the motion of the car
  D) an advantage because it is in the opposite direction of the motion of the car
  Show Answer
  The correct answer is D .
• Question 42: If the normal atmospheric pressure in a laboratory supports a column of mercury 0.76m high and the relative density of mercury is 13.8, then the height of water column which atmospheric pressure will support in the same laboratory at the same time is Options:
  A) 0m
  B) 10m
  C) 13m
  D) 14m
  E) 18m
  Show Answer
  The correct answer is B .
• Question 43: In a common emitter configuration, the output voltage is through the Options:
  A) Resistor
  B) Base
  C) Collector
  D) Emitter
  Show Answer
  The correct answer is D .
• Question 44: A shooter wants to fire a bullet in such a way that its horizontal range is equal to three times its maximum height. At the what angle should he fire the bullet to achieve this? Options:
  A) 68^o
  B) 53^o
  C) 30^o
  D) 45^o
  Show Answer
  The correct answer is B .
• Question 45: The half-life of a radio-active element is 9 days, what fraction of atoms has decayed in 36 days? Options:
  A) $\frac{1}{16}$
  B) $\frac{1}{4}$
  C) $\frac{1}{2}$
  D) $\frac{15}{16}$
  Show Answer
  The correct answer is D .
• Question 46:
  

  The effect of closing the key K in the circuit shown in the figure above would be to?

  Options:
  A) increase the current by 0.4A
  B) reduce the current by 0.4A
  C) increase the current by 0.6A
  D) reduce the current by 0.6A
  Show Answer
  The correct answer is A .
• Question 47:

  The equation of a wave traveling along the positive x-direction is given by; y = 0.25 x 10${}^{-3}$ sin (500t - 0.025x). Determine the angular velocityof the wave motion.

  Options:
  A) 0.25 x 10${}^{-3}$rads${}^{-1}$
  B) 0.25 x 10${}^{-1}$rads${}^{-1}$
  C) 5.00 x 10${}^2$rads${}^{-1}$
  D) 2.50 x 10${}^3$rads${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 48: If the pressure on 100cm³ of an ideal gas is doubled while its kelvin temperature is halved, then the new volume of the gas will become Options:
  A) 25cm³
  B) 50cm³
  C) 100cm³
  D) 200cm³
  E) 400cm³
  Show Answer
  The correct answer is A .
• Question 49:

  Lamps in domestic lightings are usually in

  Options:
  A) series
  B) divergent
  C) convergent
  D) parallel
  Show Answer
  The correct answer is D .
• Question 50: 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 Options:
  A) 2.0Hz
  B) 7.0Hz
  C) 8.8Hz
  D) 14.0Hz
  E) 17.6Hz
  Show Answer
  The correct answer is B .