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 891: A bar magnet is most effectively demagnetized by Options:
  A) placing it in a N - 5 position and hitting it with a hammer
  B) subjecting it to an electric current from a battery
  C) bringing its north pole in contact with the north pole of a very strong magnet
  D) heating the magnet
  Show Answer
  The correct answer is A .
• Question 892: Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane? Options:
  A) Random and rotational
  B) Rotational and oscillatory
  C) Rotational only
  D) Translations only
  E) Translational and rotational
  Show Answer
  The correct answer is E .
• Question 893: When a known standard resistor of 2$\mathrm{\Omega }$ is connected to the 0.0cm end of a meter bridge, the balance point is found to be at 55.0cm. What is the value of the unknown resistor? Options:
  A) 1.10$\mathrm{\Omega }$
  B) 1.64$\mathrm{\Omega }$
  C) 2.44$\mathrm{\Omega }$
  D) 27.50$\mathrm{\Omega }$
  Show Answer
  The correct answer is B .
• Question 894:

  When a water droplet is placed on a freshly cut piece of wood, it spreads out to form a thin layer because the wood is

  Options:
  A) not at equilibrium with the water
  B) cohesive to water
  C) at equilibrium with the water
  D) adhesive to water
  Show Answer
  The correct answer is D .
• Question 895: An electric iron is rated at 1000watts, 250v. The corresponding maximum resistance and accompanying current is Options:
  A) 62.5A, 4.0$\mathrm{\Omega }$
  B) 16.0A, 62.5$\mathrm{\Omega }$
  C) 62.5A, 16.0$\mathrm{\Omega }$
  D) 4.0A, 62.5$\mathrm{\Omega }$
  E) 4.0A, 250$\mathrm{\Omega }$
  Show Answer
  The correct answer is D .
• Question 896:

  

  A 50kg block is dropped from a point 10cm above as shown in the fig above. if the force constant of the spring is 4.0 x 10⁴Nm^-1, find the maximum compression of the spring [g = 10ms^-2]

  Options:
  A) 1.25m
  B) 0.50m
  C) 0.25m
  D) 0.05m
  Show Answer
  The correct answer is B .
• Question 897: The fundamental frequency of a plucked wire under a tension of 400N is 250Hz. When the frequency is changed to 500 Hz at constant length, the tension is Options:
  A) 1600N
  B) 400N
  C) 160N
  D) 40N
  Show Answer
  The correct answer is A .
• Question 898:

  

  In the diagram above, a rod 50 cm long of uniform cross-section is suspended horizontally on a fulcrum, F, by the action of two forces. What is the weight of the rod?

  Options:
  A) 40N
  B) 80N
  C) 120N
  D) 200N
  Show Answer
  The correct answer is B .
• Question 899:
  

  Calculate the effective capacitance of the circuit in the diagram given

  Options:
  A) 4μf
  B) 3μf
  C) 2μf
  D) 1μf
  Show Answer
  The correct answer is D .
• Question 900: If a mango fruit dropped at a height of 50 meters. How long does it reach the ground? (take g = 10m/s²) Options:
  A) 2 sec
  B) 3 sec
  C) 4sec
  D) 3.2sec
  Show Answer
  The correct answer is D .