Current Electricity MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The electrical energy used by an appliance over a period of time is:
A. Equal to the power multiplied by time
B. Equal to the current multiplied by time
C. Equal to the voltage multiplied by time
D. None of the above
Answer: Equal to the power multiplied by time
The electrical power consumed by an appliance is:
A. The product of the voltage and current
B. The product of the current and resistance
C. The product of the voltage and resistance
D. The sum of the voltage and current
Answer: The product of the voltage and current
The internal resistance of a cell can be determined by:
A. Measuring the voltage and current in an external circuit
B. Measuring the emf of the cell directly
C. Calculating the power delivered by the cell
D. None of the above
Answer: Measuring the voltage and current in an external circuit
The drift velocity of charge carriers in a conductor is:
A. The average velocity of the charge carriers due to the electric field
B. The velocity of charge carriers due to thermal motion
C. The maximum velocity of charge carriers
D. The velocity of charge carriers in a magnetic field
Answer: The average velocity of the charge carriers due to the electric field
The energy dissipated in a resistor is:
A. Equal to the power multiplied by time
B. Equal to the voltage multiplied by time
C. Equal to the product of current and voltage
D. None of the above
Answer: Equal to the power multiplied by time
In an ideal battery, the internal resistance is:
A. Zero
B. Equal to the external resistance
C. Equal to the emf
D. None of the above
Answer: Zero
The electric potential difference across a resistor is:
A. Equal to the product of the current and resistance
B. Equal to the sum of the currents
C. Equal to the reciprocal of the resistance
D. None of the above
Answer: Equal to the product of the current and resistance
The electromotive force (emf) of a battery is:
A. The maximum potential difference between its terminals
B. The average potential difference across its terminals
C. The power delivered by the battery
D. The resistance of the battery
Answer: The maximum potential difference between its terminals
The relationship between electric power and resistance is given by:
A. P = V² / R
B. P = I² / R
C. P = R / V
D. P = V × I
Answer: P = V² / R