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Electricity & Magnetism - Electromagnetism MCQs

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Electricity & Magnetism - Electromagnetism

Electricity & Magnetism - Electromagnetism MCQs With Answers

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CSS - PMS - CCE - PCS - General Science Electricity & Magnetism - Electromagnetism
Which scientist's law states that induced emf is related to the rate of change of magnetic flux?
A. Boyle
B. Newton
C. Faraday
D. Pascal
Correct Answer: C
Faraday's law is central to generators and transformers.
CSS - PMS - CCE - PCS - General Science Electricity & Magnetism - Electromagnetism
What is electromagnetic induction?
A. Heating due to friction
B. Production of an emf when magnetic flux through a circuit changes
C. Flow of water through a pipe
D. Static charging only
Correct Answer: B
Faraday's law links changing magnetic flux to induced emf.
CSS - PMS - CCE - PCS - General Science Electricity & Magnetism - Electromagnetism
Which rule helps determine the magnetic-field direction around a straight current-carrying wire?
A. Archimedes' principle
B. Hooke's law
C. Right-hand grip rule
D. Snell's law
Correct Answer: C
The curled fingers of the right hand indicate magnetic-field direction when the thumb points with conventional current.
CSS - PMS - CCE - PCS - General Science Electricity & Magnetism - Electromagnetism
How can the strength of a simple electromagnet usually be increased?
A. Use no core and no current
B. Reduce current to zero
C. Increase current or number of coil turns
D. Remove the coil
Correct Answer: C
More ampere-turns generally produce a stronger magnetic field.
CSS - PMS - CCE - PCS - General Science Electricity & Magnetism - Electromagnetism
What is an electromagnet?
A. A permanent magnet with no current
B. A battery only
C. A magnet produced by electric current, often using a coil around a ferromagnetic core
D. A resistor
Correct Answer: C
Current through a coil can create a controllable magnetic field.
CSS - PMS - CCE - PCS - General Science Electricity & Magnetism - Electromagnetism
What is produced around a current-carrying conductor?
A. No field
B. A magnetic field
C. A vacuum
D. Only a gravitational field
Correct Answer: B
Electric current creates a magnetic field around the conductor.
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