Current Electricity MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The resistance of a conductor increases with:
A. Increasing temperature
B. Decreasing length
C. Increasing cross-sectional area
D. None of the above
Answer: Increasing temperature
The potential difference across a resistor is:
A. Proportional to the current through it
B. Inversely proportional to the current through it
C. Equal to the power dissipated
D. Equal to the resistance times the current squared
Answer: Proportional to the current through it
The charge stored in a capacitor is directly proportional to:
A. Voltage
B. Current
C. Resistance
D. Power
Answer: Voltage
The potential difference across a resistor in a series circuit is:
A. Equal to the source voltage
B. Proportional to the resistance
C. Equal to the total resistance
D. None of the above
Answer: Proportional to the resistance
The equivalent resistance of two resistors in parallel is:
A. 1 / (1/R1 + 1/R2)
B. R1 + R2
C. R1 × R2
D. None of the above
Answer: 1 / (1/R1 + 1/R2)
The rate at which energy is converted in an electric circuit is:
A. Power
B. Resistance
C. Voltage
D. Current
Answer: Power
The electric potential energy stored in a capacitor is:
A. E = 1/2 × C × V²
B. E = C × V
C. E = 1/2 × Q × V
D. E = Q² / (2 × C)
Answer: E = 1/2 × C × V²
The power dissipated by a resistor is calculated using:
A. P = I² × R
B. P = V² / R
C. P = V × I
D. All of the above
Answer: All of the above
The total charge stored in a capacitor is given by:
A. Q = C × V
B. Q = V / C
C. Q = C / V
D. Q = V × I
Answer: Q = C × V