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# Physics WAEC past questions and answers

## Physics WAEC past questions and answers

Question: According to Newton's second law of motion, what is the relationship between force, mass, and acceleration?

A) F = maF=ma
B) F = \frac{m}{a}F=
a
m
​

C) F = m + aF=m+a
D) F = \frac{a}{m}F=
m
a
​

Question: What is the unit of electric current?

A) Volt
B) Ampere
C) Ohm
D) Watt
Question: Which law states that the total electric charge in a closed system is constant?

A) Coulomb's Law
C) Gauss's Law
D) Law of Conservation of Charge
Answer: D) Law of Conservation of Charge
Question: What is the speed of light in a vacuum?

A) 3 \times 10^83×10
8
meters per second
B) 3 \times 10^63×10
6
meters per second
C) 3 \times 10^43×10
4
meters per second
D) 3 \times 10^{10}3×10
10
meters per second
8
meters per second
Question: Which type of wave does not require a medium to propagate?

A) Sound wave
B) Light wave
C) Water wave
D) Seismic wave
Question: What is the law of reflection?

A) The angle of incidence is equal to the angle of refraction
B) The angle of reflection is equal to the angle of incidence
C) Light always travels in straight lines
D) The speed of light is constant in all media
Answer: B) The angle of reflection is equal to the angle of incidence
Question: What is the unit of power?

A) Joule
B) Watt
C) Newton
D) Pascal
Question: According to the first law of thermodynamics, what is another term for the total energy of an isolated system?

A) Internal energy
B) Enthalpy
C) Entropy
D) Heat
Question: What is the force of gravity on an object with a mass of 10 kg near the surface of the Earth?

A) 9.8 \, \text{N}9.8N
B) 10 \, \text{N}10N
C) 98 \, \text{N}98N
D) 1 \, \text{N}1N
Question: What is the principle of superposition in waves?

A) The amplitude of waves adds up when they overlap
B) Waves always interfere destructively
C) Waves cannot overlap
D) The wavelength of waves adds up when they overlap
Question: In the context of electricity, what is Ohm's Law?

A) V = IRV=IR
B) P = IVP=IV
C) I = \frac{V}{R}I=
R
V
​

D) R = \frac{V}{I}R=
I
V
​

R
V
​

Question: What is the principle of conservation of momentum?

A) Momentum is always decreasing
B) Total momentum of a system is constant if no external forces act on it
C) Momentum depends on velocity only
D) Momentum is inversely proportional to mass
Answer: B) Total momentum of a system is constant if no external forces act on it
Question: Which type of wave is characterized by oscillations parallel to the direction of energy transfer?

A) Transverse wave
B) Longitudinal wave
C) Standing wave
D) Sine wave
Question: What is the primary function of a concave lens?

A) To converge light rays
B) To diverge light rays
C) To focus light at a point
D) To magnify images
Answer: B) To diverge light rays
Question: According to Einstein's theory of relativity, what happens to the mass of an object as its speed approaches the speed of light?

A) It decreases
B) It remains constant
C) It increases
D) It becomes zero