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 901: Four cells each of e.m.f 1.5V and internal resistance of 4Ω are connected in parallel. What is the effective e.m.f. and internal resistance of the combination? Options:
  A) 6.0V, 16Ω
  B) 6.0V, 1Ω
  C) 1.5V, 4Ω
  D) 1.5V, 1Ω
  Show Answer
  The correct answer is D .
• Question 902: A machine has an efficiency of 80%. If the machine is required to overcome a load of 60N with a force of 40N, calculate its velocity ratio. Options:
  A) 0.53
  B) 0.83
  C) 1.20
  D) 1.50
  E) 1.88
  Show Answer
  The correct answer is E .
• Question 903: If a load of mass 10N stretched a cord by 1.2cm, what is the total work done? Options:
  A) 6.0 x 10^-2J
  B) 7.6 x 10^-2J
  C) 1.8 x 10^-2J
  D) 6.6 x 10^-2J
  Show Answer
  The correct answer is A .
• Question 904:
  

  Consider the three forces acting at O and in equilibrium as shown in the figure. Which of the following equations is/are CORRECT?

  I.P${}_1$ cos${\theta }_1$ = p${}_1$ cos ${\theta }_2$

  II. P${}_3$ = P${}_1$ cos ${\theta }_4$ + P${}_{2}co{s}_2$

  III. P${}_1\sin {\theta }_1=P_2\sin {\theta }_2$

  Options:
  A) I only
  B) II only
  C) III only
  D) I, II and III only
  Show Answer
  The correct answer is C .
• Question 905: The magnification of the image of an object placed in front of a convex mirror is $\frac{1}{3}$. If the radius of curvature of the mirror is 24cm, what is the distance between its object and its image? Options:
  A) 8cm
  B) 16cm
  C) 24cm
  D) 32cm
  Show Answer
  The correct answer is D .
• Question 906: Which of the following physical quantities is NOT a vector? Options:
  A) velocity
  B) work
  C) force
  D) electric field intensity
  E) magnetic induction
  Show Answer
  The correct answer is B .
• Question 907: In the process of electrification by induction, the amount of induced charge in relation to the inducing charge is the Options:
  A) same in sign and quantity
  B) same in sign but greater
  C) opposite in sign but greater
  D) opposite in sign but less
  E) opposite in sign but equal
  Show Answer
  The correct answer is E .
• Question 908: Efficiency of a transformer is equal to Options:
  A) Efficiency of transformer = (secondary coil ÷ primary coil) × 100%
  B) Efficiency of transformer = (mechanical advantage ÷ velocity ratio) × 100%
  C) Efficiency of a transformer = (Number of turns in the secondary coil ÷ Number of turns in the primary coil) × 100%
  D) Efficiency of a transformer = (power developed in the secondary coil ÷ power supplied to the primary coil) × 100%
  Show Answer
  The correct answer is D .
• Question 909:

  Water and Kerosine are drawn respectively into the two limbs of a Hare's apparatus. The destiny of water is 1.0gcm${}^{-3}$ and the density of kerosine is 0.80gcm${}^{-3}$. If the height of the water column is 20.0cm, calculate the height of the kerosine column.

  Options:
  A) 1.6cm
  B) 16.0cm
  C) 20.0cm
  D) 25.0cm
  Show Answer
  The correct answer is D .
• Question 910:

  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 .