Physics General Knowledge MCQs

86. What is the SI unit of power?
a) Watt
b) Joule
c) Newton
d) Pascal

87. What is the process by which a gas turns into a plasma?
a) Ionization
b) Vaporization
c) Condensation
d) Sublimation

88. What is the formula for electric power?
a) P = IV
b) P = IR
c) P = V²/R
d) P = I²R

89. Which law states that for every action, there is an equal and opposite reaction?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Conservation of Energy

90. What is the process by which a liquid turns into a gas at a temperature below its boiling point?
a) Vaporization
b) Sublimation
c) Evaporation
d) Condensation