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 211: A vehicle of mass m is driven by an engine of power P from rest. Find the minimum time it will take to acquire a speed Options:
  A) $\frac{m{v}^2}{t}$
  B) $\frac{m{v}^2}{2t}$
  C) $\frac{mv}{t}$
  D) $\frac{mv}{2t}$
  Show Answer
  The correct answer is A .
• Question 212: A Motor Tyre is inflated to pressure of 2.0 x 10⁵Nm^-2 when the temperature of air is 27^oC. What will be the pressure in it at 87^oC assuming that the volume of the Tyre does not change? Options:
  A) 2.6 x 10⁵Nm^-2
  B) 2.4 x 10⁵Nm^-2
  C) 2.2 x 10⁵Nm^-2
  D) 1.3 x 10⁵Nm^-2
  Show Answer
  The correct answer is B .
• Question 213: A mass of a liquid at 30^oC is mixed with a mass of the same liquid at 70^oC and the temperature of the mixture is 45^oC. Find the ratio of the mass of the cold liquid to the mass of the other liquid. Options:
  A) 3 : 5
  B) 5 : 3
  C) 3 : 7
  D) 7 : 3
  Show Answer
  The correct answer is B .
• Question 214: The echo of a sounder from the bottom of an ocean is heard 2.5 seconds later. If the speed of sound in water is 1,400ms^-1, the depth of the ocean is Options:
  A) 1,750m
  B) 3,500m
  C) 1,400m
  D) 2,800m
  E) 2,100m
  Show Answer
  The correct answer is A .
• Question 215:

  Which of these isa second-class lever?

  Options:
  A) sugar tongs
  B) claw hammer
  C) plier
  D) wheelbarrow
  Show Answer
  The correct answer is D .
• Question 216: The capacitance of a parallel plate capacitor is 20 μf in air and 60 μf in the presence of a dielectric. What is the dielectric constant? Options:
  A) 0.3
  B) 6.0
  C) 3.0
  D) 2.0
  Show Answer
  The correct answer is C .
• Question 217: The external and internal diameter of a tube are measured as (32 ± 2)mm and (21 ± 1)mm respectively. Determine the percentage error in the thickness of the tube. Options:
  A) 27%
  B) 14%
  C) 9%
  D) 3%
  Show Answer
  The correct answer is C .
• Question 218: The distance travelled by a particle starting from rest is plotted against the square of the time elapsed from the commencement of motion. The resulting graph is linear, the slope of this graph is a measure of Options:
  A) initial displacement
  B) initial velocity
  C) acceleration
  D) half the acceleration
  E) half the initial velocity
  Show Answer
  The correct answer is C .
• Question 219: A person can focus objects when they lie beyond 75 cm from his eyes. The focal length of the lens required to reduce his least distance of distinct vision to 25 cm is? Options:
  A) 37.50 cm
  B) 75.00 cm
  C) 18.75
  D) 25.00 cm
  Show Answer
  The correct answer is A .
• Question 220:

  In semi-conductor, the carriers of current at room temperature are

  Options:
  A) electrons only
  B) electrons and holes
  C) holes only
  D) electron and ions
  Show Answer
  The correct answer is B .