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 1311:

  A solid weighs10.00N in air,6N when forcefully immersed in water, and 7.0N when fully immersed in a liquid, X. Calculate the relative density of the liquid X.

  Options:
  A) $\frac{5}{3}$
  B) $\frac{4}{3}$
  C) $\frac{3}{4}$
  D) $\frac{7}{10}$
  Show Answer
  The correct answer is C .
• Question 1312: Two closed vessels contain equal volumes of boiling water and are identical except that one is blackened on the outside while the other is polished. Which of the following is correct? Options:
  A) the polished vessel will cool faster because a polished surface is a good radiator
  B) the polished vessel will cool faster because it will absorbe less heat from the room
  C) the black vessel will cool faster because it is a better conductor of heat
  D) the polished vesselwill cool faster because it reflects heat better
  E) the black vessel will cool faster because a black surface radiates heat faster than a polished one
  Show Answer
  The correct answer is D .
• Question 1313:

  The refractive index of a liquid is 1.5. If the velocity of light in vacuum is 3.0 x 10${}^{8}m{s}^{-1}$, the velocity of light in the liquid is

  Options:
  A) 1.5 x 10${}^{8}m{s}^{-1}$
  B) 2.0 x 10${}^{8}m{s}^{-1}$
  C) 3.0 x 10${}^{8}m{s}^{-1}$
  D) 4.5 x 10${}^{8}m{s}^{-1}$
  Show Answer
  The correct answer is B .
• Question 1314:

  An air bubble of radius 4.5 cm initially at a depth of 12 m below the water surface rises to the surface. If the atmospheric pressure is equal to 10.34 m of water, the radius of the bubble just before it reaches the water surface is

  Options:
  A) 6.43 cm
  B) 8.24 cm
  C) 4.26 cm
  D) 5.82 cm
  Show Answer
  The correct answer is D .
• Question 1315: An object is placed 15cm in front of a concave mirror of radius 40cm. The image formed Options:
  A) virtual and 60cm behind the mirror
  B) real and 60cm behind the mirror
  C) virtual and at infinity
  D) real and at infinity
  E) virtual and 40cm from the mirror
  Show Answer
  The correct answer is A .
• Question 1316:

  

  In the diagram above, what would happen to the current I, if another resistor, R₂, is connected in parallel to R₁?

  Options:
  A) It will increase because the equivalent resistance will increase
  B) It will decrease if R₂ is greater than R₁
  C) It will increase because the effective resistance will decrease
  D) It will decrease if R₂ is less than R₁
  Show Answer
  The correct answer is C .
• Question 1317:

  When a brick is taken from the earth's surface to the moon, its mass

  Options:
  A) Remains constant
  B) Becomes zero
  C) Reduces
  D) increases
  Show Answer
  The correct answer is A .
• Question 1318:

  Which of the following is/are not true about the heat capacity of a substance?

  (i) It is an intensive property
  (ii) Its S.I unit is $jK-1$
  (iii) It is an extensive property
  (iv) Its S.I unit is $jkg-1$

  Options:
  A) (i) and (iii) only
  B) (i), (ii) and (iv) only
  C) (i) and (iv) only
  D) (ii) and (iii) only
  Show Answer
  The correct answer is C .
• Question 1319: Two inductors of inductances 5 mll and 15 mll are connected in series and a current of 5A flows through them. the total energy stored in the inductor is Options:
  A) 500.0J
  B) 250.0J
  C) 62.5J
  D) 50.0J
  E) no correct option
  Show Answer
  The correct answer is E .
• Question 1320: The factional force between two bodies Options:
  A) exists only when there is relative motion or tendency for motion
  B) acts so as to oppose the motion
  C) depends on the normal reaction between the two surfaces
  D) is relatively independent of the area in contact
  E) has all of these characteristics
  Show Answer
  The correct answer is E .