Physics Past Questions 2025

Sample WAEC-style Practice Questions (Original Content)

WAEC Style

Question 1

Which of the following is a supplementary unit in the S.I. system?

Question 2

A car of mass 1200kg moving at 10 m/s is brought to rest in 20 seconds by a constant braking force. Calculate the magnitude of the force.

Question 3

The area under a velocity-time graph represents:

Question 4

Calculate the work done when a force of 20N stretches a wire by 0.4m.

Question 5

A body moves in a circle of radius 2.0m with a constant linear speed of 10 m/s. Calculate its angular velocity.

Question 6

Which of the following is the dimension for Work?

Question 7

The escape velocity from the Earth's surface is approximately:

Question 8

A machine has a mechanical advantage of 4 and an efficiency of 75 percent. Calculate its velocity ratio.

Question 9

The handle of a door is usually placed as far as possible from the hinges to provide a:

Question 10

A bullet of mass 0.02kg is fired from a gun of mass 4kg. If the bullet leaves with a velocity of 200 m/s, calculate the recoil velocity of the gun.

Question 11

Which of the following materials is most elastic?

Question 12

Upthrust on a body fully immersed in a liquid depends on the:

Question 13

The pressure at a depth of 20m in water is P. What is the pressure at a depth of 20m in a liquid whose density is twice that of water?

Question 14

The anomalous expansion of water occurs between:

Question 15

Which of the following thermometers is used to measure very high temperatures, such as in a furnace?

Question 16

The heat required to change the state of 1kg of a substance without a change in temperature is:

Question 17

A gas occupies 500 cm^3 at 27 degrees C. At what temperature will it occupy 1000 cm^3 at constant pressure?

Question 18

The process of heat transfer in a vacuum is:

Question 19

Specific heat capacity is measured in:

Question 20

The smell of perfume spreading across a room is an evidence of:

Question 21

Which of the following waves requires a material medium for propagation?

Question 22

The image formed by a plane mirror is always:

Question 23

Calculate the refractive index of a medium if the speed of light in it is 2.0 x 10^8 m/s. (Speed of light in vacuum = 3.0 x 10^8 m/s)

Question 24

The defect of the eye where a person sees far objects clearly but cannot see near objects is:

Question 25

Which of the following is a stringed instrument?

Question 26

The loudness of sound is most closely related to its:

Question 27

The fundamental frequency of a closed pipe of length L is:

Question 28

When light passes from air into water, its frequency:

Question 29

A convex lens has a focal length of 10cm. Calculate its power.

Question 30

The color of light with the shortest wavelength in the visible spectrum is:

Question 31

The unit of electric potential difference is the:

Question 32

Three 4-ohm resistors are connected in series. What is the effective resistance?

Question 33

A device used to store electric charge is a:

Question 34

The resistance of a conductor is 10 ohms. If a potential difference of 20V is applied, calculate the current.

Question 35

The part of an AC generator that conducts current to the external circuit is the:

Question 36

The magnetic field lines around a straight current-carrying wire are:

Question 37

A step-up transformer has a primary coil of 100 turns and a secondary coil of 500 turns. If the input voltage is 20V, find the output voltage.

Question 38

Which of the following is an example of a "hard" magnetic material?

Question 39

The process of adding an impurity to a semiconductor to increase its conductivity is:

Question 40

A semiconductor diode conducts current when it is:

Question 41

Cathode rays consist of fast-moving:

Question 42

The particle emitted in a radioactive decay that has a negative charge is the:

Question 43

A radioactive substance has a half-life of 10 minutes. If 100g is present initially, how much remains after 30 minutes?

Question 44

Which radiation has the least ionizing power but the highest penetrating power?

Question 45

The process of splitting a heavy nucleus into two smaller nuclei is:

Question 46

Which of the following is a primary source of energy in the sun?

Question 47

Calculate the energy of a photon of light with a frequency of 5.0 x 10^14 Hz. (h = 6.6 x 10^-34 Js)

Question 48

A p-type semiconductor is obtained by doping a pure semiconductor with a ______ element.

Question 49

The stopping potential in a photoelectric experiment depends on the:

Question 50

The time taken for a satellite to complete one orbit around the Earth is its:

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