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 1431: A good calorimeter should be of Options:
  A) low specific heat capacity and low heat conductivity
  B) low specific heat capacity and high heat conductivity
  C) high specific heat capacity and low heat conductivity
  D) high specific heat capacity and low heat conductivity
  E) dull surface and low heat conductivity
  Show Answer
  The correct answer is B .
• Question 1432: A heating coil rated at 100W is used to boil off 0.5kg of boiling water. The time taken to boil off the water is [specific latent heat of vaporization of water = 2.3 x 10⁶Jkg^-1] Options:
  A) 1.15 x 10⁹ s
  B) 1.15 x 10⁷ s
  C) 1.15 x 10⁵ s
  D) 1.15 x 10⁴ s
  Show Answer
  The correct answer is D .
• Question 1433: A 10g mass placed on the pan of a spring balance causes an extension of 5cm. If a 15g mass is placed on the pan of the same spring balance, the extension is Options:
  A) 3.3cm
  B) 6.5cm
  C) 7.5cm
  D) 10.8cm
  E) 15.0cm
  Show Answer
  The correct answer is C .
• Question 1434:

  Arrange the following in the order of their increasing frequency.I. Visible light

  II. Gamma rays

  III. Radio waves

  IV. Infra-red radiation

  V. Ultra-violet radiation

  Options:
  A) I, II, III, IV, V
  B) II, III, IV, V, I
  C) III, IV, V, I, II
  D) IV, III, I. V, II
  E) III, IV, I,V, II
  Show Answer
  The correct answer is E .
• Question 1435: In a semi conductor junction diode, as the depletion or barrier layer is forward-biased, the layer Options:
  A) widens
  B) narrows
  C) remains constant
  D) widens then narrows
  Show Answer
  The correct answer is C .
• Question 1436: Which of the following has no effect on radiation? Options:
  A) nature of surface
  B) density
  C) surface area
  D) temperature
  Show Answer
  The correct answer is B .
• Question 1437:

  

  Calculate the e.m.f of the cell in the above circuit if its internal resistance is negligible.

  Options:
  A) 12 V
  B) 8 V
  C) 2 V
  D) 36 V
  Show Answer
  The correct answer is B .
• Question 1438: A machine has a velocity ratio of 4. if it requires 800 N to overcome a load of 1600 N,what is the efficiency of the machine? Options:
  A) 60%
  B) 50%
  C) 40%
  D) 2%
  Show Answer
  The correct answer is B .
• Question 1439: A piece of iron weights 250 N in air and 200 N in a liquid of density 1000 kgm^-3. the volume of the iron is? Options:
  A) 5.0 x 10^-2 ms^-2
  B) 4.5 x 10^--2 ms^-3
  C) 2.5 x 10^-2 ms^-8
  D) 2.0 x 10^-2 ms^-3
  Show Answer
  The correct answer is C .
• Question 1440: Which to the following is NOT a fundamental unit? Options:
  A) Ampere
  B) Kelvin
  C) Kilogramme
  D) Newton
  E) Second
  Show Answer
  The correct answer is D .