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 1141: A galvanometer of internal resistance 50$\mathrm{\Omega }$ has a full scale deflection for a current of 5mA. What is the resistance required to covert it to a voltmeter with full scale deflection of 10V? Options:
  A) 1750$\mathrm{\Omega }$
  B) 1950$\mathrm{\Omega }$
  C) 2000$\mathrm{\Omega }$
  D) 2500$\mathrm{\Omega }$
  Show Answer
  The correct answer is B .
• Question 1142: The primary aim in high tension transmission is to Options:
  A) minimize electrical energy losses due to heat production
  B) increase the rate of energy transfer by using high voltage
  C) increase the current in the wire
  D) generate electricity at high current and low voltage
  Show Answer
  The correct answer is A .
• Question 1143:

  A body is uniformly accelerated from rest. Which of the following quantities vary/varies linearly with the square of the time? I. Displacement

  II. Velocity

  III. Momentum

  Options:
  A) I only
  B) II only
  C) III only
  D) I and II only
  E) II and Ill only
  Show Answer
  The correct answer is A .
• Question 1144:

  If a force of 50N stretches a wire from 20m to 20.01m, what is the amount of force required to stretch the same material from 20m to 20.05m?

  Options:
  A) 250N
  B) 200N
  C) 100N
  D) 50N
  Show Answer
  The correct answer is A .
• Question 1145:

  Two bodies have masses in the ratio3:1. They experience forces whichimpart to them,acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced

  Options:
  A) 1:4
  B) 2:1
  C) 2:3
  D) 2:5
  Show Answer
  The correct answer is C .
• Question 1146: A bead traveling on a straight wire is brought to rest at 0.2m by friction. If the mass of the bead is 0.01kg and the coefficient of friction between the bead and the wire is 0.1 determine the work done by the friction Options:
  A) $2\times {10}^{-4}J$
  B) $2\times {10}^{-3}J$
  C) $2\times {10}^{1}J$
  D) $2\times {10}^{2}J$
  Show Answer
  The correct answer is B .
• Question 1147:

  

  The diagram shown represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is 40, then the value of W is?

  Options:
  A) 28.0
  B) 48.0N
  C) 233.0N
  D) 50.0N
  Show Answer
  The correct answer is D .
• Question 1148:

  If a sound wave goes from a cold air region to a hot air region, its wavelength will?

  Options:
  A) increase
  B) decrease
  C) decrease then increase
  D) remain constant
  Show Answer
  The correct answer is A .
• Question 1149: Why do soldiers march disorderly while crossing a bridge? Options:
  A) To prevent resonance on the bridge
  B) To set the bridge into resonance
  C) To make the b ridge collapse
  D) To spread their weight evenly on the bridge
  Show Answer
  The correct answer is A .
• Question 1150: Two lamps are rated 40W and 220V each are connected in series. The total power dissipated in both lamps is Options:
  A) 10W
  B) 20W
  C) 40W
  D) 80W
  E) None of the above
  Show Answer
  The correct answer is D .