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 621: A weightless vessel of dimensions 4m x 3m x 2m is filled with a liquid of density 1000kgm^-3 and sealed. What is the maximum pressure this container can exert on a flat surface? [g = 10ms^-2] Options:
  A) 9 x 10⁴NM^-2
  B) 4 x 10⁴NM^-2
  C) 3 x 10⁴NM^-2
  D) 2 x 10⁴NM^-2
  Show Answer
  The correct answer is D .
• Question 622:

  A man swung an object of mass 2 kg in a circular path with a rope 1.2 m long. If the object was swung at 120 rev/min, find the tension in the rope.

  Options:
  A) 400 N
  B) 288 N
  C) 240 N
  D) 379 N
  Show Answer
  The correct answer is D .
• Question 623: An object placed 15cm from a converging lens forms a real image whose magnification is 2.0. What is the focal length of the lens? Options:
  A) 5.00cm
  B) 10.00cm
  C) 15.00 cm
  D) 18.00 cm
  E) 20.00cm
  Show Answer
  The correct answer is B .
• Question 624:

  One of the following readings represents the measurement of thelength of a metal rod using vernier callipers. Taking the reading accuracy into consideration, the most likely one is

  Options:
  A) 5.16cm
  B) 5.165cm
  C) 5.0cm
  D) 5.160cm
  Show Answer
  The correct answer is A .
• Question 625: To keep a vehicle moving at a constant speed v, requires power P, from the engine. The force provided by the engine is Options:
  A) $\frac{p}{v}$
  B) $\frac{1}{2}$ v
  C) pv
  D) $\frac{p}{v^2}$ v
  Show Answer
  The correct answer is A .
• Question 626:

  The smallest unit on the sleeve of a micrometer screw gauge is 0.5mm. There are fifty divisions on the thimble of the screw gauge.

  What is the smallest length that can be measured with this instrument?

  Options:
  A) 0.05cm
  B) 0.01cm
  C) 0.005cm
  D) 0.001cm
  E) 0.0001cm
  Show Answer
  The correct answer is D .
• Question 627: A cell of internal resistance 1Ω supplies current to an external resistor of 3Ω. The efficiency of the cell is Options:
  A) 25%
  B) 33%
  C) 50%
  D) 75%
  Show Answer
  The correct answer is D .
• Question 628: The resistance of a series R-C circuit is 5 ω If the impedance of the circuit is 13 ω calculate the reactance of the capacitor Options:
  A) 12 Ω
  B) 14 Ω
  C) 16 Ω
  D) 18 Ω
  E) 65 Ω
  Show Answer
  The correct answer is A .
• Question 629:

  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 630: An object placed 10cm from a concave mirror of focal length 5cm would have its image Options:
  A) at the centre of convature
  B) at the radius of curvature
  C) at infinity
  D) 10 cm from the focus
  Show Answer
  The correct answer is A .