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 2221: If the refractive index of glass is 1.5, what is the critical angle at the air-glass interface? Options:
  A) sin^-1$\frac{1}{2}$
  B) sin^-1$\frac{2}{3}$
  C) sin^-1$\frac{3}{4}$
  D) sin^-1$\frac{8}{9}$
  Show Answer
  The correct answer is B .
• Question 2222: A 20kg mass is to be pulled up a slope inclined at 30^o to the horizontal. If the efficiency of the plane is 75%, the force required to pull the load up the plane is [g = 10ms^-2] Options:
  A) 13.3N
  B) 73.5N
  C) 133.3N
  D) 53.2N
  Show Answer
  The correct answer is C .
• Question 2223: A galvanometer of internal resistance 50$\mathrm{\Omega }$ has a full scale deflection for a current of 5mA. What is the resistance required to covert it to a voltmeter with full scale deflection of 10V? Options:
  A) 1750$\mathrm{\Omega }$
  B) 1950$\mathrm{\Omega }$
  C) 2000$\mathrm{\Omega }$
  D) 2500$\mathrm{\Omega }$
  Show Answer
  The correct answer is B .
• Question 2224: At different locations on the earth's surface, the earth's magnetic field is Options:
  A) the same in magnitude and direction
  B) the same in magnitude but different in direction
  C) different in both magnitude and direction
  D) different in magnitude but different in direction
  Show Answer
  The correct answer is A .
• Question 2225: Two forces of magnitudes 7N and 3N act at right angles to each other. The angle $\theta$ between the resultant and the 7N force is given by Options:
  A) cos$\theta$ = $\frac{3}{7}$
  B) sin$\theta$ = $\frac{3}{7}$
  C) tan$\theta$ = $\frac{3}{7}$
  D) cot$\theta$ = $\frac{3}{7}$
  Show Answer
  The correct answer is C .
• Question 2226:

  A carstarts from rest and covers a distance of 40 m in 10 s. Calculatethe magnitude of its acceleration

  Options:
  A) 3.20 ms${}^{-2}$
  B) 0.25 ms${}^{-2}$
  C) 0.80 ms${}^{-2}$
  D) 4.00 ms${}^{-2}$
  Show Answer
  The correct answer is C .
• Question 2227: A Motor Tyre is inflated to pressure of 2.0 x 10⁵Nm^-2 when the temperature of air is 27^oC. What will be the pressure in it at 87^oC assuming that the volume of the Tyre does not change? Options:
  A) 2.6 x 10⁵Nm^-2
  B) 2.4 x 10⁵Nm^-2
  C) 2.2 x 10⁵Nm^-2
  D) 1.3 x 10⁵Nm^-2
  Show Answer
  The correct answer is B .
• Question 2228:

  A straight wire 15cm long, carrying a current of 6.0A is in a uniform field of 0.40T. What is the force on the wire when it is at right angle to the field

  Options:
  A) 0.46N
  B) 0.35N
  C) 0.36N
  D) 0,24N
  Show Answer
  The correct answer is C .
• Question 2229:

  

  PQRS is rectangular cell with PQ perpendicular to the magnetic field as shown above. If a current flows in the the direction PQRS in what direction will the coil move

  Options:
  A) Upwards
  B) Downwards
  C) TOwards The North Pole
  D) Towards The South Pole
  Show Answer
  The correct answer is A .
• Question 2230:

  What is the name of the model of the atom that describes electrons as orbiting the nucleus in specific energy levels?

  Options:
  A) Bohr model
  B) Dalton model
  C) Rutherford model
  D) Thomson model
  Show Answer
  The correct answer is A .