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 651:

  Water and Kerosine are drawn respectively into the two limbs of a Hare's apparatus. The destiny of water is 1.0gcm${}^{-3}$ and the density of kerosine is 0.80gcm${}^{-3}$. If the height of the water column is 20.0cm, calculate the height of the kerosine column.

  Options:
  A) 1.6cm
  B) 16.0cm
  C) 20.0cm
  D) 25.0cm
  Show Answer
  The correct answer is D .
• Question 652:

  

  The diagram above shows a balanced metre bridge, the value of x is

  Options:
  A) 75.0 cm
  B) 66.7 cm
  C) 33.3 cm
  D) 25.0 cm
  Show Answer
  The correct answer is C .
• Question 653: A current of 100mA passes through a conductor for 2 minutes. The quantity of electricity transported is Options:
  A) 200C
  B) 50C
  C) 12C
  D) 0.002C
  Show Answer
  The correct answer is C .
• Question 654: The direction of the path taken by light is called Options:
  A) Locus
  B) Lines
  C) Ray
  D) Beam
  Show Answer
  The correct answer is C .
• Question 655:

  A bead travelling on a straight line wire is brought to rest at 0.2 by friction. If the mass of the bead is 0.01kg and the coefficient of friction between the bead and the wire is 0.1, determine the work one by the friction. [g = 10ms²]

  Options:
  A) 2 $\times$ 10^-4
  B) 2 $\times$ 10^-3
  C) 2 $\times$ 10¹
  D) 2 $\times$ 10²
  Show Answer
  The correct answer is B .
• Question 656: When a biro pen rubbed on a dry silk cloth is moved very close to a piece of paper on a dry table, the pen is found to pick up the paper. This is because Options:
  A) both the pen and the cloth are magnetized
  B) the pen is magnetized but the cloth is not
  C) the pen is charged while the cloth is magnetized
  D) both the pen and the cloth are charged
  Show Answer
  The correct answer is D .
• Question 657:

  During the transformation of matter from the solid to the liquid state, the heat supplied does not produce a temperature increase because

  Options:
  A) the heat energy is quickly conducted away
  B) the heat capacity has become very large as the substance melts
  C) the heat gained is equal to the heat lost by the substance
  D) all the heat is used to break the bonds holding the molecules of the solid together
  Show Answer
  The correct answer is D .
• Question 658:

  If the frequency of an emitted x-ray is 1.6 x 10${}^{16}$Hz, the accelerating potential is?

  [e = 1.6 x 10${}^{-19}$J, h = 6.63 x 10-${}^{34}$Js]

  Options:
  A) 6630.0V
  B) 663.0V
  C) 66.3V
  D) 6.6V
  Show Answer
  The correct answer is C .
• Question 659:

  An alternating current can induce voltage because it has

  Options:
  A) ripple value
  B) varying magnetic field
  C) weaker magnetic field than direct current
  D) high peak value
  Show Answer
  The correct answer is B .
• Question 660:

  The Earth's magnetic equator passes through Jos in Nigeria. At Jos, the

  Options:
  A) angle of variation is zero
  B) magnetic declination is 90
  C) angle of dip is zero
  D) horizontal component at the Earth's field is zero
  Show Answer
  The correct answer is C .