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 1221:

  I. The frictional force is independent of the area of the surfaces in conduct
  II. The frictional force depends on the nature of the surfaces in contact
  III. The frictional force depends on the speed of sliding
  IV. The frictional force is directly proportional to the normal reaction.

  Which combination of the above is true of sliding friction?

  Options:
  A) I, III and IV
  B) I, II and IV
  C) I, II and III
  D) II, III and IV
  Show Answer
  The correct answer is B .
• Question 1222: What is the approximate critical angle for total internal reflection for diamond if the refractive index of diamond is 2.42? Options:
  A) 21^o
  B) 22^o
  C) 23^o
  D) 24^o
  Show Answer
  The correct answer is D .
• Question 1223: Which of the following correctly describes the energy changes in the generation of light by a hydroelectric power station? Options:
  A) Electrical $\to$ mechanical $\to$ potential
  B) potential $\to$mechanical $\to$electrical $\to$ light
  C) mechanical $\to$ sound $\to$ electrical $\to$ light
  D) kinetic $\to$ mechanical $\to$ electrical $\to$light
  Show Answer
  The correct answer is B .
• Question 1224: The electrochemical equivalent of silver is 0.0012gC^-1. If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5.0mins, the current must be Options:
  A) 6000A
  B) 100A
  C) 10A
  D) 1A
  Show Answer
  The correct answer is B .
• Question 1225:

  

  The diagram above shows the prism arrangement in a

  Options:
  A) Microscope
  B) tereoscope
  C) projector
  D) periscope
  E) gyroscope
  Show Answer
  The correct answer is D .
• Question 1226: A radio is operated by eight cells each of e.m.f. 2.0V connected in series. If two of the cells are wrongly connected, the net e.m.f. of the radio is Options:
  A) 8V
  B) 10V
  C) 12V
  D) 16V
  Show Answer
  The correct answer is C .
• Question 1227: The speed of sound in air at sea-level is 340ms^-1 while that of light is 300 000kms^-1. How far (to the nearest meter) from the center of a thunderstorm is an observer who hears a thunder 2s after a lightening flash? Options:
  A) 170ms^-1
  B) 340ms^-1
  C) 600ms^-1
  D) 680ms^-1
  Show Answer
  The correct answer is D .
• Question 1228:

  A bar magnet is divided into two pieces, which of the following statement is correct?

  Options:
  A) two new magnets are created
  B) the magnetic field of each separate piece becomes stronger
  C) the electric field is created
  D) the bar magnet is demagnetized
  Show Answer
  The correct answer is A .
• Question 1229: In a nuclear fusion process, four protons each of mass M_p were fused to produce a nucleus X of mass M_x. Which of the following equations is CORRECT? Options:
  A) 4M_p > M_x
  B) 4M_p = M_x
  C) 4M_p< M_x
  D) M_p > M_x
  Show Answer
  The correct answer is B .
• Question 1230: 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 .