Current Electricity MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The power dissipated by a resistor is given by:
A. P = I² × R
B. P = V² / R
C. P = V × I
D. All of the above
Answer: All of the above
The potential difference across a capacitor is:
A. Directly proportional to the charge stored
B. Inversely proportional to the charge stored
C. Independent of the charge stored
D. Equal to the current times the time
Answer: Directly proportional to the charge stored
The unit of electrical capacitance is:
A. Farad
B. Ohm
C. Volt
D. Ampere
Answer: Farad
The resistance of a wire depends on all of the following except:
A. Length of the wire
B. Cross-sectional area of the wire
C. Material of the wire
D. Voltage applied across the wire
Answer: Voltage applied across the wire
The total resistance of resistors in parallel is:
A. Less than the smallest individual resistance
B. Equal to the smallest individual resistance
C. Greater than the largest individual resistance
D. Equal to the sum of all resistances
Answer: Less than the smallest individual resistance
The current through a resistor in a circuit is:
A. Directly proportional to the voltage across it
B. Inversely proportional to the resistance
C. Both A and B
D. Neither A nor B
Answer: Both A and B
The unit of power is the:
A. Watt
B. Ohm
C. Volt
D. Ampere
Answer: Watt
The power dissipated in a resistor is given by:
A. P = V² / R
B. P = I² × R
C. P = V × I
D. All of the above
Answer: All of the above
In a circuit with resistors in parallel, the equivalent resistance is:
A. Less than the smallest individual resistor
B. Equal to the smallest individual resistor
C. Greater than the largest individual resistor
D. Equal to the sum of all resistances
Answer: Less than the smallest individual resistor