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 1201: Alternating current can induce voltage because it has a Options:
  A) ripple value
  B) varying magnetic field
  C) weaker magnetic field than direct current
  D) stonger magnetic field than direct current
  E) high peak value
  Show Answer
  The correct answer is D .
• Question 1202:

  

  In the Figure above, QR is a vertical conductor and the current I flows from R to Q, P is a point on the horizontal plane and is to the south of the wire. The direction of the magnetic field at P due to the current is

  Options:
  A) Upward
  B) North
  C) South
  D) West
  E) East
  Show Answer
  The correct answer is D .
• Question 1203:

  A bridge made of steel is 600m long. What is the daily variation in its length if the night-time and daytime temperatures are 10^oC and 35^oC respectively. The linear expansivity of steel is 0.000012C^-1

  Options:
  A) 0.18cm
  B) 1.80cm
  C) 18.00cm
  D) 1800cm
  Show Answer
  The correct answer is C .
• Question 1204: Which of the following correctly explains why soft iron is proffered to steel in electromagnets? i. soft iron is more readily magnetized than steel. ii. soft iron is more readily demagnetized than steel. iii. soft iron retains magnetism more than steel. Options:
  A) i only
  B) ii and iii only
  C) i and ii only
  D) i, ii, and iii.
  Show Answer
  The correct answer is C .
• Question 1205: In a tuned radio receiver R, L, C series circuit for resonance, the inductive and capacitive reactance X_L and X_C respectively are related as Options:
  A) X_L = X_C
  B) X_L = ¹/₂X_C
  C) X_L = ¹/_XC
  D) X_L = 2X_C
  Show Answer
  The correct answer is A .
• Question 1206: Which of the following statements is correct? Silvered walls of a vacuum flask are used to prevent Options:
  A) heat loss due to conduction
  B) vacuum loss
  C) heat entry into the inner flask due to convection
  D) heat loss due to radiation
  E) heat loss due to convection
  Show Answer
  The correct answer is D .
• Question 1207: In photo-emission, the number of photo-electrons ejected per second depends on the Options:
  A) frequency of the beam
  B) work function of the metal
  C) threshold frequency of the metal
  D) intensity of the beam
  Show Answer
  The correct answer is C .
• Question 1208: A simple pendulum has a period of 17.0s. When the length is shorten by 1.5m, its period is 8.5s. Calculate the original length of the pendulum Options:
  A) 4.0 m
  B) 3.0 m
  C) 2.0 m
  D) 1.5 m
  Show Answer
  The correct answer is C .
• Question 1209: A moving coil galvanometer has a full-scale deflection of 3A equivalent to 30^o deflection. The sensitivity of the instrument is Options:
  A) 33.0
  B) 0.1
  C) 90.0
  D) 10.0
  Show Answer
  The correct answer is D .
• Question 1210:

  A 500W heater is used to heat 0.6kg of water from 25^oC to 100^oC in t₂ seconds. If another 1000W heater is used to heat 0.2kg of water from 10^oC to 100^oC in t, seconds, find $\frac{t_1}{t_2}$

  Options:
  A) 50
  B) 5
  C) 5/4
  D) 1/5
  Show Answer
  The correct answer is D .