Current Electricity MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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In a circuit, if the voltage is constant and the resistance is doubled, the current:
A. Halves
B. Doubles
C. Remains the same
D. Quadruples
Answer: Halves
The energy stored in a capacitor is:
A. Proportional to the square of the voltage
B. Proportional to the charge
C. Inversely proportional to the capacitance
D. Inversely proportional to the voltage
Answer: Proportional to the square of the voltage
The total energy supplied to a circuit is equal to:
A. The sum of the energy dissipated in all components
B. The difference between the voltage and current
C. The product of the resistance and power
D. The product of current and time
Answer: The sum of the energy dissipated in all components
The total current in a parallel circuit is equal to:
A. The sum of the currents through each branch
B. The same through each branch
C. The product of the currents through each branch
D. The difference between the currents in each branch
Answer: The sum of the currents through each branch
The power dissipated in a resistor can also be calculated using:
A. P = V² / R
B. P = I² × R
C. P = V × I
D. All of the above
Answer: All of the above
The equivalent capacitance of capacitors in series is:
A. 1 / (1/C1 + 1/C2)
B. C1 + C2
C. C1 × C2
D. None of the above
Answer: 1 / (1/C1 + 1/C2)
The electric field strength between two parallel plates is:
A. Uniform and directed from positive to negative
B. Uniform and directed from negative to positive
C. Non-uniform and directed from positive to negative
D. Non-uniform and directed from negative to positive
Answer: Uniform and directed from positive to negative
The power dissipated in an electrical component is given by:
A. P = I × V
B. P = V / R
C. P = I / R
D. P = R / I
Answer: P = I × V
The unit of electric potential is:
A. Volt
B. Watt
C. Ampere
D. Ohm
Answer: Volt