Physics General Knowledge MCQs

16. Which of the following is an example of a scalar quantity?
a) Velocity
b) Acceleration
c) Force
d) Temperature

17. What is the SI unit of frequency?
a) Hertz
b) Watt
c) Joule
d) Ohm

18. What is the formula for power?
a) P = Fd
b) P = QV
c) P = W/t
d) P = 1/2mv²

19. What is the formula for density?
a) ρ = m/V
b) ρ = V/m
c) ρ = F/A
d) ρ = P/V

20. What is the process by which a gas turns into a liquid called?
a) Sublimation
b) Evaporation
c) Boiling
d) Condensation