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 151: Which of the following statements on the use of X-rays is incorrect? X-rays are used Options:
  A) in hospitals to obtain photogaphs of tissues and bones in the body
  B) for the treatment of malignant growths like cancer cells
  C) in detecting fingerprints
  D) to reveal hidden flaws in metal castings and welded joints
  E) to detect alternations which have been made to works of art
  Show Answer
  The correct answer is E .
• Question 152:

  A transverse wave is applied to a string whose mass per unit length is 3 x 10^-2kgm^-1. If the string is under a tension 12N, the speed of the propagation of the wave is

  Options:
  A) 5 ms^-1
  B) 20 ms^-1
  C) 30 ms^-1
  D) 40 ms^-1
  Show Answer
  The correct answer is B .
• Question 153: Which of the following is TRUE of a particle moving in a horizontal circle with constant angular velocity? Options:
  A) The energy is costant but the linear momentum varies
  B) The linear momentum is conatant but the energy varies
  C) both energy and linear momentum are constant
  D) The speed and the linear velocity are both constant
  Show Answer
  The correct answer is C .
• Question 154: When a charge moves through an electric circuit in the direction of an electric force, it Options:
  A) gains both potential and kinetic energy
  B) gains potential energy and lose kinetic energy
  C) loses potential energy and gains kinetic energy
  D) loses both potential and kinetic energy
  Show Answer
  The correct answer is A .
• Question 155: in a series R-L-C circuit at resonance, the voltages across the resistor and the inductor are 30V and 40V respectively, what is the voltage across the capacitor? Options:
  A) 30V
  B) 40V
  C) 50V
  D) 70V
  Show Answer
  The correct answer is B .
• Question 156:

  Which of the following statements regarding the application of electrical conduction via gases is/are correct?
  Electrical conduction in gas is applied in:
  (i) The identification of gases
  (ii) Lighting/fluorescent tubes
  (iii) Photocells
  (iv) Cathode ray oscilloscope/T.V. tubes

  Options:
  A) (i), (iii) and (iv) only
  B) (i), (ii) and (iv) only
  C) (ii), (iii) and (iv) only
  D) (i), (ii) and (iii) only
  Show Answer
  The correct answer is B .
• Question 157: A cell of internal resistance 0.01Ω can be measured accurately using the Options:
  A) Ohm meter
  B) metre bridge
  C) potentiometer
  D) electroscope
  Show Answer
  The correct answer is C .
• Question 158:

  A man stands 4m in front of a plane mirror. If the mirror is moved 1m towards the man, the distance between him and his new image is?

  Options:
  A) 3m
  B) 5m
  C) 6m
  D) 10m
  Show Answer
  The correct answer is C .
• Question 159: Which of the following representations is correct for an atom X with 28 electrons and 30 neutrons? Options:
  A) ${}_{28}^{30}X$
  B) ${}_{30}^{28}X$
  C) ${}_{30}^{58}X$
  D) ${}_{28}^{58}X$
  Show Answer
  The correct answer is D .
• Question 160: The magnification of the image of an object placed in front of a convex mirror is $\frac{1}{3}$. If the radius of curvature of the mirror is 24cm, what is the distance between its object and its image? Options:
  A) 8cm
  B) 16cm
  C) 24cm
  D) 32cm
  Show Answer
  The correct answer is D .