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 1811:

  Which of the following may be used to determine the relative humidity in a physics laboratory I. Manometer

  II. Wet-and-Dry Bulb Hygrometer

  III. Hair Hygrometer

  IV. A Hydrometer

  Options:
  A) I Only
  B) II and III Only
  C) II Only
  D) III Only
  E) II,IIIand IV Only
  Show Answer
  The correct answer is B .
• Question 1812:

  A positively charged particle is placed near a negatively charged particle. What is the direction of the electric force between the two particles?

  Options:
  A) The electric force is directed from the negative particle to the positive particle.
  B) The electric force is zero.
  C) The direction of the electric force cannot be determined.
  D) The electric force is directed from the positive particle to the negative particle.
  Show Answer
  The correct answer is D .
• Question 1813: If in a simple pendulum experiment the length of the inextensible string is increased by a factor of four, its period is increased by a factor of Options:
  A) 4
  B) $\frac{\pi }{2}$
  C) $\frac{1}{4}$
  D) 2$\pi$
  E) 2
  Show Answer
  The correct answer is E .
• Question 1814:

  

  In the diagram above, a rod 50 cm long of uniform cross-section is suspended horizontally on a fulcrum, F, by the action of two forces. What is the weight of the rod?

  Options:
  A) 40N
  B) 80N
  C) 120N
  D) 200N
  Show Answer
  The correct answer is B .
• Question 1815: A wheel and axle have radii 80cm and 10cm respectively. If the efficiency of the machine is 0.85, an applied force of 1200N to the wheel will raise a load of Options:
  A) 8.0N
  B) 6.8N
  C) 8160N
  D) 9600N
  Show Answer
  The correct answer is C .
• Question 1816: A ball of mass 0.1kg is thrown vertically upwards with a speed of 10ms^-1 from the top of a tower 10m high. Neglecting air resistance, its total energy just before hitting the ground is(take g = 10ms^-2) Options:
  A) 5 J
  B) 10 J
  C) 15 J
  D) 20 J
  Show Answer
  The correct answer is C .
• Question 1817: Two bodies have masses in the ratio 3:1. They experience forces which impart to them acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced. Options:
  A) 1 : 4
  B) 2 : 1
  C) 2 : 3
  D) 2 : 5
  Show Answer
  The correct answer is C .
• Question 1818: In what range of temperature is the expansion of water anomalous? Options:
  A) +208^oC to +212^oC
  B) -80^oC + -76^oC
  C) -4^oC to 0^oC
  D) +96^oC to +100^oC
  E) 0^oC to +4^oC
  Show Answer
  The correct answer is E .
• Question 1819: A saturated vapour pressure of a liquid increases when the Options:
  A) Temperature of a liquid increases
  B) Volume of the liquid increases
  C) Volume of the liquid decreases
  D) Temperature of the liquid decreases
  Show Answer
  The correct answer is A .
• Question 1820: The difference of potential between the terminals of cells is 2.2 volts. When a 4ohm resistor is connected across the terminals of this cells, the potential difference is 2 volts. What is the internal resistance of the cell? Options:
  A) 0.10 ohms
  B) 0.25ohms
  C) 0.40ohms
  D) 2.50ohms
  E) 4.00ohms
  Show Answer
  The correct answer is C .