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 1181: The phenomenon of photoelectric effect is used in the following EXCEPT Options:
  A) automatic doors
  B) bugler alarm
  C) electric fire alarm
  D) sound production from film tracks
  E) television cameras
  Show Answer
  The correct answer is D .
• Question 1182: If I is the current passing through a metallic resistor and H is the rate of Heat generated in the resistor at a constant temperature, then Options:
  A) H $\alpha$ $\frac{1}{I}$
  B) H $\alpha$ $\frac{1}{I^2}$
  C) H $\alpha$ $\sqrt{1}$
  D) H $\alpha$ I²
  E) none of the above
  Show Answer
  The correct answer is D .
• Question 1183: A jet engine develops a thrust of 270Ns when the velocity of the exhaust gases relative to the engine is 300ms^-1. What is the mass of the material ejected per second? Options:
  A) 81.00kg
  B) 9.00kg
  C) 0.90kg
  D) 0.09kg
  Show Answer
  The correct answer is C .
• Question 1184: A magnetic needle is suspended first at the earth's north magnetic pole and then at a point on the magnetic equator. The respective angles between the needle and the horizontal are Options:
  A) 0^o and 0^o
  B) 60^o and 60^o
  C) 90^o and 90^o
  D) 90^o and 0^o
  E) 0^o and 90^o
  Show Answer
  The correct answer is D .
• Question 1185: Radio receivers are tuned using Options:
  A) electromagnets
  B) electric motors
  C) Inductors
  D) variable capacitors
  E) variable resistors
  Show Answer
  The correct answer is D .
• Question 1186: The distance between the fixed points of a centigrade thermometer is 20cm. What is the temperature when the mercury level is 4.5cm above the lower mark? Options:
  A) 22.5^oC
  B) 29.0^oC
  C) 90.0^oC
  D) 100.0^oC
  Show Answer
  The correct answer is A .
• Question 1187:

  In a radioactive series:

  ${}_{92}^{235}L{\to }_{93}^{235}M{\to }_{90}^{235}N{\to }_{90}^{235}\varphi$

  The particles emitted are respectively

  Options:
  A) $\beta \beta \alpha$
  B) $\alpha \gamma \beta$
  C) $\gamma \alpha \beta$
  D) $\alpha \alpha \beta$
  E) $\beta \alpha \beta$
  Show Answer
  The correct answer is C .
• Question 1188: Electrons were discovered by Options:
  A) James Chadwick B.
  B) J.J Thompson
  C) Sir Isaac Newton
  D) Charles Newton
  Show Answer
  The correct answer is B .
• Question 1189: If the relative density of gold is 19.2, the volume of 2.4kg of gold is? Options:
  A) 8.00 x 10^-3 m³
  B) 1.25 x 10^-4 m³
  C) 1.92 x 10^-4 m³
  D) 4.61 x 10^-3 m³
  Show Answer
  The correct answer is B .
• Question 1190: An object placed 15cm from a converging lens forms a real image whose magnification is 2.0. What is the focal length of the lens? Options:
  A) 5.00cm
  B) 10.00cm
  C) 15.00 cm
  D) 18.00 cm
  E) 20.00cm
  Show Answer
  The correct answer is B .