Current Electricity MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The electric field strength between two parallel plates is given by:
A. E = V / d
B. E = I / d
C. E = R / d
D. E = C / d
Answer: E = V / d
The resistance of a conductor is inversely proportional to:
A. Cross-sectional area
B. Length
C. Temperature
D. Voltage
Answer: Cross-sectional area
The unit of electrical power is:
A. Watt
B. Joule
C. Volt
D. Ampere
Answer: Watt
The time constant of an RC circuit is:
A. τ = R × C
B. τ = R / C
C. τ = C / R
D. τ = R + C
Answer: τ = R × C
The total current in a series circuit is:
A. The same through each resistor
B. Different through each resistor
C. Equal to the sum of the currents through each resistor
D. None of the above
Answer: The same through each resistor
The equivalent capacitance of capacitors in parallel is:
A. The sum of their capacitances
B. The reciprocal of the sum of the reciprocals of their capacitances
C. The smallest capacitance
D. The largest capacitance
Answer: The sum of their capacitances
The resistance of a wire is directly proportional to:
A. Length of the wire
B. Cross-sectional area of the wire
C. Material of the wire
D. None of the above
Answer: Length of the wire
In a series circuit, the total current is:
A. The same through each component
B. Different through each component
C. Equal to the sum of the currents through each component
D. None of the above
Answer: The same through each component
In a circuit with a constant voltage source, increasing the resistance will result in:
A. Decreased current
B. Increased current
C. No change in current
D. Decreased voltage
Answer: Decreased current