Waec Physics Past Questions and Answers

Question 2031:

• WAEC 2021

Determine the speed of the wave.

A. 64 cm/s
B. 32 cm/s
C. 24 cm/s
D. 72 cm/s

Question 2032:

• WAEC 2021

Which of the following curved surfaces will produce a real image? I. Concave mirror II. Convex mirror III. Diverging lens IV. Converging lens

A. I and III only
B. I, II and IV only
C. II, III and V only
D. II and IV only

Question 2033:

• WAEC 2021

The components of vectors Q and R are (-3.0, 5.5) and (9.2, 4.4) respectively. Determine the components of Q + R.

A. (3.7, 7.4)
B. (6.2, 9.9)
C. (2.5, -4 .8).
D. (14.7, 1.4)

Question 2034:

• WAEC 2021

Which of the arrangements of radiations below shows decreasing order of wavelengths?

A. X-rays> radio waves > infrared radiations
B. Radio waves> infrared radiations > X-rays
C. Infrared radiations > radio waves > X-rays
D. X-rays> infrared radiations > radio waves

Question 2035:

• WAEC 2021

An electric pressing iron is connected to the mains using an insulated wire. wire becomes very hot.
The heat generated in the wire can be minimized by replacing the wire with one of?

A. Thinner insulation.
B. Greater diameter.
C. Smaller diameter.
D. Thicker insulation.