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Electricity & Magnetism - Electric Current MCQs

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Electricity & Magnetism - Electric Current

Electricity & Magnetism - Electric Current MCQs With Answers

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CSS - PMS - CCE - PCS - General Science Electricity & Magnetism - Electric Current
What is direct current (DC)?
A. Current with no charge movement
B. Current that reverses direction periodically
C. Only current in gases
D. Current that flows predominantly in one direction
Correct Answer: D
DC maintains a consistent polarity and direction of charge flow.
CSS - PMS - CCE - PCS - General Science Electricity & Magnetism - Electric Current
In conventional current direction, current is considered to flow from which terminal externally?
A. No direction is defined
B. Positive to negative
C. From ground to sky
D. Negative to positive only
Correct Answer: B
Conventional current is defined opposite to electron drift in metallic conductors.
CSS - PMS - CCE - PCS - General Science Electricity & Magnetism - Electric Current
What instrument is used to measure electric current?
A. Voltmeter
B. Ammeter
C. Barometer
D. Thermometer
Correct Answer: B
An ammeter is connected in series to measure circuit current.
CSS - PMS - CCE - PCS - General Science Electricity & Magnetism - Electric Current
Which equation relates current I, charge Q and time t?
A. I = m/v
B. I = Q/t
C. I = V×R
D. I = P×t
Correct Answer: B
Current equals charge transferred divided by elapsed time.
CSS - PMS - CCE - PCS - General Science Electricity & Magnetism - Electric Current
What is the SI unit of electric current?
A. Ohm
B. Watt
C. Volt
D. Ampere
Correct Answer: D
The ampere is the SI base unit of electric current.
CSS - PMS - CCE - PCS - General Science Electricity & Magnetism - Electric Current
What is electric current?
A. Rate of flow of electric charge
B. Energy per unit charge
C. Mass per unit volume
D. Force per unit area
Correct Answer: A
Current measures how much charge passes a point per unit time.
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