91. What is the formula for electric potential energy?
a) U = QV
b) U = IR
c) U = 1/2kQ²/r
d) U = mgh
Answer: a) U = QV
92. What is the SI unit of electric charge?
a) Coulomb
b) Ampere
c) Volt
d) Ohm
Answer: a) Coulomb
93. What is the formula for electric field strength?
a) E = F/q
b) E = kQ/r²
c) E = V/d
d) E = IR
Answer: b) E = kQ/r²
94. What is the process by which a gas turns into a liquid without going through the intermediate stage of a liquid?
a) Vaporization
b) Sublimation
c) Melting
d) Deposition
Answer: d) Deposition
95. What is the formula for capacitance?
a) C = Q/V
b) C = IR
c) C = εA/d
d) C = 1/2kQ²
Answer: a) C = Q/V
