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:

  An open-tube mercury manometer is used to measure the pressure in a gas tank. When the atmospheric pressure is 101,325 $P_a$, what is the absolute pressure in $P_a$ in the tank if the height of the mercury in the open tube is 25 cm higher. density of mercury = $13600kg/m^3,g=9.8m/s^2$

  Options:
  A) 108,986 Pa
  B) 165,238 Pa
  C) 122,364 Pa
  D) 134,645 Pa
  Show Answer
  The correct answer is D .
• Question 1182:

  Heat I. is a form of energy

  II. is measured with a thermometer

  III. cannot be created or destroyed

  IV. from a hot object is transferred through conduction only. Which of the statements above are correct?

  Options:
  A) I and II only
  B) I and III only
  C) I, II and III only
  D) II, III and IV only
  E) I, II, III and IV
  Show Answer
  The correct answer is B .
• Question 1183: An empty 60 litre petrol tank has a mass of 10kg. Its mass when full of fuel of relative density 0.72 is Options:
  A) 7.2kg
  B) 33.2kg
  C) 43.2kg
  D) 53.2kg
  Show Answer
  The correct answer is D .
• Question 1184:

  A ball of mass 0.5kg moving at 10ms${}^{-1}$ collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.

  Options:
  A) 0.2ms${}^{-1}$
  B) 0.5ms${}^{-1}$
  C) 5.0ms${}^{-1}$
  D) 5.5ms${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 1185: Which of the following instruments has a pure tone? Options:
  A) guitar
  B) vibrating strings
  C) tuning fork
  D) siren
  Show Answer
  The correct answer is C .
• Question 1186:

  Which of the following is not correct about the molecules of a substance in a gaseous state. They?

  Options:
  A) are in a constant state of motion
  B) have different speeds
  C) have a temperature which is measured by the average kinetic energy
  D) The collision between the gases is perfectly inelastic
  Show Answer
  The correct answer is D .
• Question 1187: The half-life of a radio-active element is 9 days, what fraction of atoms has decayed in 36 days? Options:
  A) $\frac{1}{16}$
  B) $\frac{1}{4}$
  C) $\frac{1}{2}$
  D) $\frac{15}{16}$
  Show Answer
  The correct answer is D .
• Question 1188:

  

  The figure above shows a uniform circular object, center R and diameter PS. A circular section 6 and Diameter PR is cut from it. if PQRS is a straight line, where is center of gravity of the figure

  Options:
  A) Q
  B) R
  C) A point between P and R
  D) A point between R and S
  Show Answer
  The correct answer is D .
• Question 1189: A hydrometer is an instrument used in measuring Options:
  A) vapour pressure of a fluid
  B) density of liquid
  C) relative humidity of a liquid
  D) relative density of a liquid
  Show Answer
  The correct answer is D .
• Question 1190: Which of the following statements is correct about light and sound waves? Both Options:
  A) are longitudinal waves
  B) are transverse waves
  C) have the same velocity in air
  D) need a medium for propagation
  E) transmit energy
  Show Answer
  The correct answer is E .