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 31: Cathode rays are Options:
  A) high-energy electromagnetic waves
  B) protons
  C) streams of electrons
  D) neutrons
  E) radio waves
  Show Answer
  The correct answer is C .
• Question 32:

  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 33: Which of the following statements is NOT correct? Options:
  A) A galvanometer can be converted to an ammeter with a different range by connecting a high resistance in series
  B) An electric current always produces a magnetic field
  C) Maxwell's screw rule states that if a corkscrew moves inthe direction of the current, the hand turns in the direction of the lines of force
  D) Electromagnets are used in electric bells and telephone recievers
  E) The lines of force round a straight current carrying conductor are circular
  Show Answer
  The correct answer is A .
• Question 34:

  Particles of mass 10${}^{-2}$kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rad${}^{-1}$. If the radius of the blade is 0.2m, the centripetalforce is?

  Options:
  A) 2N
  B) 20N
  C) 200N
  D) 400N
  Show Answer
  The correct answer is B .
• Question 35:

  What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 Kobo per KWh?

  Options:
  A) N0.65
  B) N0.39
  C) N3.90
  D) N0.13
  Show Answer
  The correct answer is D .
• Question 36:

  

  In the diagram above, a 200 W bulb is lighted by a 240 V a.c mains supply. If 1kwh is sold at ₦40, the cost of keeping the bulb lighted for a day is

  Options:
  A) ₦1,920.00
  B) ₦192.00
  C) ₦19.20
  D) ₦1.92
  Show Answer
  The correct answer is B .
• Question 37: Non-luminous object can be seen because they Options:
  A) reflect light
  B) are near
  C) are polished
  D) emit light
  Show Answer
  The correct answer is A .
• Question 38:

  The amount of heat needed to raise the temperature of 10kg of Copper by 1K is its

  Options:
  A) specific heat capacity
  B) latent heat
  C) heat capacity
  D) internal energy
  Show Answer
  The correct answer is A .
• Question 39: A substance has a half of 3mins. after 6mins. the count rate was observed to be 400. What was its count rate at zero time? Options:
  A) 200
  B) 1200
  C) 1600
  D) 2400
  Show Answer
  The correct answer is C .
• Question 40:

  A 3000W electric cooker is to be used on a 200V mains circuit. Which of the fuses below can be used safely with the cooker?

  Options:
  A) 2A
  B) 5A
  C) 10A
  D) 20A
  Show Answer
  The correct answer is D .