Physics 2021 Waec Past Questions and Answers

Question 6 :

• WAEC 2021

A heat sensitive resistor made of a semiconductor is called?

A. Thermometer.
B. Thermostat.
C. Thermistor
D. Thermopile.

Question 7 :

• WAEC 2021

Electric motor primarily converts?

A. Electrical energy to chemical energy.
B. Kinetic energy to potential energy
C. Electrical energy to mechanical energy
D. Electrical energy to heat energy.

Question 8 :

• WAEC 2021

Which of the following statements about the molecules of solids and liquids is correct? They both

A. Have weak attraction.
B. Have wide separations.
C. Exhibit random motion.
D. Exhibit vibratory motion.

Question 9 :

• WAEC 2021

The distance between a node and its adjacent antinode of a transverse wave is equal to?

A. Half of the wavelength.
B. The wavelength.
C. Thrice the wavelength.
D. Quarter of the wavelength.

Question 10 :

• WAEC 2021

Which of the sketched graphs below illustrates the correct variation of the gravitational force, Fg between two objects and the distance, d, between the centres?

A. A
B. B
C. C
D. D