Waec Physics 2021 Past Questions and Answers

Question 26:

• WAEC 2021

The diagram illustrates the velocity- time graph of a body. Calculate the distance covered by the body. during the motion.

A. 15m
B. 84m
C. 72m
D. 48m

Question 27:

• WAEC 2021

An atom that emits an a-particle?

A. May become a different element.
B. Becomes a different isotope of the element.
C. Daughter with increased mass.
D. Becomes a daughter of a different element always.

Question 28:

• WAEC 2021

Which of the following units is equivalent to the unit of electric current?

A. C s\({-1}\)
B. W
C. J s\({-1}\)
D. C

Question 29:

• WAEC 2021

A ball is swung in a horizontal circle of centre O with a constant speed. acceleration?

A. Away from O
B. Along the Circumference of the circle
C. Toward centre O
D. Along a tangent to the circle

Question 30:

• WAEC 2021

Which of the following statements is an effect of compressing gas molecules at constant temperature?

A. The pressure on the molecules decreases.
B. The molecules gain more kinetic energy.
C. The molecules make more impact per second on the walls of the container.
D. The molecules increase in size.