56. What is the process by which an atom loses or gains electrons?
a) Conduction
b) Induction
c) Radiation
d) Ionization
Answer: d) Ionization
57. What is the unit of power in the metric system?
a) Watt
b) Horsepower
c) Kilowatt
d) Joule
Answer: a) Watt
58. What is the formula for electric potential energy?
a) U = Fd
b) U = QV
c) U = mgh
d) U = 1/2mv²
Answer: b) U = QV
59. Which type of energy is produced by the movement of electric charges?
a) Nuclear energy
b) Chemical energy
c) Thermal energy
d) Electrical energy
Answer: d) Electrical energy
60. What is the process by which a solid turns directly into a gas?
a) Vaporization
b) Sublimation
c) Melting
d) Condensation
Answer: b) Sublimation
