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 271: A transistor is used in the amplification of signals because it Options:
  A) controls the flow of current
  B) consumes a lot of power
  C) allows doping
  D) contains electron and hole carriers
  Show Answer
  The correct answer is A .
• Question 272:

  

  A body is under action of a force F such that the force displacement graph of the body is semi circular as shown above. The work done on the body by the force in moving through 24 meters is

  Options:
  A) 36π J
  B) 72π J
  C) 144π J
  D) 288π J
  Show Answer
  The correct answer is B .
• Question 273: Neutron were discovered by Options:
  A) J.J. Thompson
  B) James Chadwick
  C) Michael faraday
  D) Dalton
  Show Answer
  The correct answer is B .
• Question 274: A conductor has a diameter of 1.00mm and length of 2.00m. If the resistance of the material is 0.1Ω, the resistivity is Options:
  A) 2.55 * 10⁵ Ωm
  B) 2.55 * 10³ Ωm
  C) 3.93 * 10^-6 Ωm
  D) 3.93 * 10^-8 Ωm
  Show Answer
  The correct answer is D .
• Question 275: A body of mass 2kg moving vertically upwards has its velocity increased uniformly from 10ms^-1 to 40ms^-1 in 4s. Neglecting air resistance, calculate the upward vertical force acting on the body.[g = 10 ms^-1] Options:
  A) 15N
  B) 20N
  C) 35N
  D) 45N
  Show Answer
  The correct answer is C .
• Question 276: Calculate the energy stored in an inductor of inductance 0.5H when a current of 3A flows through it. Options:
  A) 15.00 J
  B) 9.45 J
  C) 6.00 J
  D) 4.50J
  E) 2.25 J
  Show Answer
  The correct answer is E .
• Question 277:

  The inside portion of part of a hollow metal sphere of diameter 20cm is polished. The portion will therefore form a?

  Options:
  A) concave mirror of focal length 5cm
  B) concave mirror of focal length 10cm
  C) convex mirror of focal length 5cm
  D) convex mirror of focal length 10cm
  Show Answer
  The correct answer is C .
• Question 278: Which of the following are True for $\alpha$-decay. i. mass number, decrease by four. ii. Atomic number decreases by two. iii. mass number does not change. Options:
  A) i and ii only
  B) ii and iii only
  C) i and iii only
  D) i, ii, and iii only
  Show Answer
  The correct answer is A .
• Question 279: The power dissipated in an a.c. circuit with an r.m.s, current of 5A, r.m.s voltage of 10V and a phase angle of 60^o is Options:
  A) 25W
  B) 50W
  C) 120W
  D) 125W
  Show Answer
  The correct answer is A .
• Question 280:

  

  A body of mass 6kg rests on an inclined plane. The normal reaction is R and the limiting frictional force is F as shown in the image above. if F = 30N, and g = 10ms² then the angle of inclination $\theta$ is

  Options:
  A) ${15}^{\circ }$
  B) ${30}^{\circ }$
  C) ${45}^{\circ }$
  D) ${60}^{\circ }$
  E) ${75}^{\circ }$
  Show Answer
  The correct answer is B .