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 861: The spiral spring of a spring balance is 25.0cm long when 5N hangs on it and 30cm long, when the weight is 10N. What is the length of the spring if the weight is 3N assuming Hooke's law is obeyed? Options:
  A) 15.0cm
  B) 17.0cm
  C) 20.0cm
  D) 23.0cm
  Show Answer
  The correct answer is D .
• Question 862:

  A 40 kW electric cable is used to transmit electricity through a resistor of resistance 2.0Ω at 800 V. The power loss as internal energy is?

  Options:
  A) 4.0 x 10²W
  B) 5.0 x 10²W
  C) 4.0 x 10³W
  D) 5.0 x 10³W
  Show Answer
  The correct answer is D .
• Question 863:

  A boy sits in a train moving with uniform speed on a straight track. If from his outstretched palm he gently tosses his coin upwards, the coin will fall

  Options:
  A) in front of his palm
  B) behind his palm
  C) beside his palm
  D) into his palm
  Show Answer
  The correct answer is D .
• Question 864: A 12V battery has an internal resistance of 0.5W.If a cable of 1.0W resistance is connected across the two terminals of the battery, the current drawn from the battery is Options:
  A) 16.0A
  B) 8.0A
  C) 0.8A
  D) 0.4A
  Show Answer
  The correct answer is B .
• Question 865: A cube of side 10cm and mass 0.5kg floats in a liquid with only $\frac{1}{5}$ of its height above the liquid surface. What is the relative density of the liquid? Options:
  A) 0.125cm^-1
  B) 0.250gcm^-1
  C) 0.625cm^-1
  D) 2.500cm^-1
  Show Answer
  The correct answer is C .
• Question 866: A satellite moves in a circular orbit of radius 4R round the earth. The acceleration of the satellite in terms of g is Options:
  A) $\frac{g}{16}$
  B) $\frac{g}{4}$
  C) $\frac{4}{g}$
  D) $\frac{16}{g}$
  Show Answer
  The correct answer is A .
• Question 867: Electric charges on the surface of a conductor would be most evenly distributed if the shape of the conductor is Options:
  A) conical
  B) cubical
  C) cylindrical
  D) parabolic
  E) spherical
  Show Answer
  The correct answer is C .
• Question 868:

  In homes, electrical appliances and lamps are connected in parallel because

  Options:
  A) less current will be used
  B) less voltage will be used
  C) parallel connection does not heat up the wires
  D) series connection uses high voltage
  Show Answer
  The correct answer is D .
• Question 869: 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 .
• Question 870: A block-and-tackle system is used to lift a load of 20N through a vertical height of 10m. if the efficiency of the system is 40%, how much work is done against friction? Options:
  A) 80J
  B) 120J
  C) 300J
  D) 500J
  Show Answer
  The correct answer is C .