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 41: The instrument that measures both ac and dc is called Options:
  A) A current balance
  B) a moving coil ammenter
  C) a moving iron ammeter
  D) an inverter
  Show Answer
  The correct answer is C .
• Question 42:

  

  The diagram above shows the velocity-time graph of a vehicle. Its acceleration and retardation respectively are

  Options:
  A) 8.0 ms^-2, 4,0 ms^-2
  B) 4.0 ms^-2, 8.0 ms^-2
  C) 4.0 ms^-2, 2.0 ms^-2
  D) 2.0 ms^-2, 4.0 ms^-2
  Show Answer
  The correct answer is C .
• Question 43: If the angle of declination in a place is 10^oE, calculate the true geographic bearing if the compass reads N40^oE Options:
  A) N50^oE
  B) N40^oE
  C) N30^oE
  D) N25^oE
  Show Answer
  The correct answer is C .
• Question 44: A spring of length 25cm is extended to 30cm by a load of 150N attached to one of its end, what is the energy stored in the spring? Options:
  A) 3750J
  B) 2500J
  C) 3.75J
  D) 2.50J
  Show Answer
  The correct answer is C .
• Question 45: An electric water pump rate 1.5 kW, lifts 200kg of water through a vertical height of 6 meters in seconds. What is the efficiency of the pump? [g = 10ms^-2, neglecting air resistance] Options:
  A) 90.0%
  B) 85.0%
  C) 80.0%
  D) 65.0%
  Show Answer
  The correct answer is C .
• Question 46:

  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 47: The velocities of light in air and glass are 3.0 x 10⁸ms^-1 and 2.0 x 10⁸ms^-1 respectively. If the angle of refraction is 30°, the sine of the angle of incidence is Options:
  A) 0.33
  B) 0.50
  C) 0.67
  D) 0.75
  Show Answer
  The correct answer is D .
• Question 48: Three electric cells each of e.m.f 1.5V and internal resistance of 1.0$\mathrm{\Omega }$ are connected in parallel across an external resistance of $\frac{2}{3}$$\mathrm{\Omega }$. Calculate the value of the current in the resistor Options:
  A) 0.5 A
  B) 0.9A
  C) 1.5A
  D) 4.5A
  Show Answer
  The correct answer is C .
• Question 49:

  Which of the following is/are not true about the heat capacity of a substance?

  (i) It is an intensive property
  (ii) Its S.I unit is $jK-1$
  (iii) It is an extensive property
  (iv) Its S.I unit is $jkg-1$

  Options:
  A) (i) and (iii) only
  B) (i), (ii) and (iv) only
  C) (i) and (iv) only
  D) (ii) and (iii) only
  Show Answer
  The correct answer is C .
• Question 50: A person can focus objects when they lie beyond 75 cm from his eyes. The focal length of the lens required to reduce his least distance of distinct vision to 25 cm is? Options:
  A) 37.50 cm
  B) 75.00 cm
  C) 18.75
  D) 25.00 cm
  Show Answer
  The correct answer is A .