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 1511: A stone of mass 1kg is dropped from a height of 10m above the ground and falls freely under gravity. Its kinetic energy 5m above the ground is then equal to Options:
  A) its kinetic energy on the ground
  B) twice its initial potential energy
  C) its initial potential energy
  D) half its initial potential energy
  Show Answer
  The correct answer is D .
• Question 1512: Every house supplied with electricity is provided with a box of fuses so that Options:
  A) the consumption of electricity can be recorded
  B) people residing in the house will not have an electric shock if they touch a live wire
  C) the total current drawn from the mains can be limited
  D) the voltage supply can be stabilized
  E) it serves as a standby supply when there is a power failure
  Show Answer
  The correct answer is C .
• Question 1513:

  A capacitor and a resistor are connected in series with each other and in series with an accumulator of negligible internal resistance. The potential across the terminals of the capacitor is

  Options:
  A) twice the e.m.f of the accumulator
  B) less than the e.m.f by the potential drop across the resistor
  C) zero
  D) the same as the e.m.f.
  E) greater than
  Show Answer
  The correct answer is B .
• Question 1514: The kinetic theory of photoelectron liberated from a metallic surface depends on the Options:
  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
  Show Answer
  The correct answer is D .
• Question 1515:

  Which of the following equations is the correct definition of the reactance of an indicator L?

  Options:
  A) Reactance = (Amplitude of voltage) $÷$ (Amplitude of current)
  B) Reactance = (Amplitude of voltage) x (Amplitude of current)
  C) Reactance = (Amplitude of current)${}^2$ $÷$ (Amplitude of voltage)
  D) Reactance = (Amplitude of current)${}^2$ $÷$ (Amplitude of voltage)$\frac{1}{2}$
  Show Answer
  The correct answer is A .
• Question 1516:

  

  The diagram above shows a balanced metre bridge, the value of x is

  Options:
  A) 75.0 cm
  B) 66.7 cm
  C) 33.3 cm
  D) 25.0 cm
  Show Answer
  The correct answer is C .
• Question 1517: Two divers G and H are at depths 20m and 40m respectively below the water surface in a lake. The pressure on G is P₁ while the pressure on H is P₂. If the atmospheric pressure is equivalent to 10m of water, then the value of $\frac{p_2}{p_1}$ is Options:
  A) 0.50
  B) 0.60
  C) 1.67
  D) 2.00
  E) 3.0
  Show Answer
  The correct answer is D .
• Question 1518: In measuring high frequency a.c, the instrument used is the Options:
  A) d.c ammeter
  B) moving coil ammeter
  C) moving iron ammeter
  D) hot wire ammeter
  Show Answer
  The correct answer is D .
• Question 1519: The photocell works on the principle of the Options:
  A) voltaic cell
  B) emision of electrons by incident radiation
  C) emision of protons by incident electrons
  D) photographic plate
  Show Answer
  The correct answer is B .
• Question 1520:

  In which of the following device in the expansion of solid is a disadvantages?

  I. Simple pendulum

  II. Fire alarms

  III. Thermostat

  IV. Bimetallic thermometer

  Options:
  A) III only
  B) II & III only
  C) I only
  D) II, III & IV only
  Show Answer
  The correct answer is C .