Question 4316:

• 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 4317:

• 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 4318:

• 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 4319:

• 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.

Question 4320:

• WAEC 2021

The diagram above is an illustration of an a.c. circuit.Calculate the reactance of the capacitor.

A. 2016Ω
B. 2000Ω
C. 200Ω
D. 4000Ω