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 1351: In a Daniel cell, the depolarizer, positive and negative electrodes are respectively Options:
  A) copper sulphate, copper and zinc
  B) manganese dioxide, carbon and zinc
  C) sulphuric acid, lead oxide and lead
  D) potassium hydroxide, nickel and iron.
  Show Answer
  The correct answer is A .
• Question 1352: Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1] Options:
  A) 840J
  B) 3360J
  C) 3420J
  D) 4200J
  E) 7560J
  Show Answer
  The correct answer is E .
• Question 1353: Metal cables are used as telephone wires because Options:
  A) they are cheap
  B) they are sourced locally
  C) the speed of sound in them is very low
  D) the speed of sound in them is very high
  Show Answer
  The correct answer is D .
• Question 1354: The difference of potential between the terminals of cells is 2.2 volts. When a 4ohm resistor is connected across the terminals of this cells, the potential difference is 2 volts. What is the internal resistance of the cell? Options:
  A) 0.10 ohms
  B) 0.25ohms
  C) 0.40ohms
  D) 2.50ohms
  E) 4.00ohms
  Show Answer
  The correct answer is C .
• Question 1355:

  Musical instruments playing the same note can be distinguished from one another owing to the difference in their

  Options:
  A) quality
  B) pitch
  C) intensity
  D) loudness
  Show Answer
  The correct answer is A .
• Question 1356: A glass bottle of initial volume 2 x 10⁴ cm³ is heated from 20^oC to 50^oC. If the linear expansivity of glass is 9 x 10⁶K^-1, the volume of the bottle at 50^oC is Options:
  A) 20016.2cm³
  B) 20005.4cm³
  C) 20008.1cm³
  D) 20013.5cm³
  Show Answer
  The correct answer is A .
• Question 1357: A uniform cylindrical block of wood floats in water with one-third of its height above the water level, in a liquid of relative density 0.8, what fraction of its height will be above the liquid level? Options:
  A) $\frac{1}{6}$
  B) $\frac{1}{5}$
  C) $\frac{1}{3}$
  D) $\frac{4}{5}$
  E) $\frac{5}{6}$
  Show Answer
  The correct answer is E .
• Question 1358:
  

  Find the tension in the two cords shown in the figure above. Neglect the mass of the cords, and assume that the angle is 38° and the mass m is 220 kg

  [Take g = 9.8 ms-2]

  Options:
  A) $T_1$ = 2864 N, $T_2$= 3612 N
  B) $T_1$= 3612 N, $T_2$ = 2864 N
  C) $T_1$= 3502 N, $T_2$= 2760 N
  D) $T_1$ = 2760 N, $T_2$ = 3502 N
  Show Answer
  The correct answer is C .
• Question 1359:

  The density of 400cm³ of palm oil was 0.9gcm^-3 before frying. If the density of the oil was 0.6gcm^-3 after frying, assuming no loss of oil due to spilling, its new volume was?

  Options:
  A) 1360cm${}^3$
  B) 600cm${}^3$
  C) 240cm${}^3$
  D) 8000m${}^3$
  Show Answer
  The correct answer is B .
• Question 1360: When a brick is taken from the earth's surface to the moon, its mass Options:
  A) remains constant
  B) reduces
  C) increases
  D) becomes zero
  Show Answer
  The correct answer is A .