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Electrical Engineering - Magnetism and Electromagnetism

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Exercise : Magnetism and Electromagnetism - General Questions
1.
When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage
increases
decreases
remains constant
reaches zero
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is
1,000 V
2,000 V
31.25 V
3,125 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
For a given wirewound core, an increase in current through the coil
reverses the flux lines
decreases the flux density
increases the flux density
causes no change in flux density
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density
increases
decreases
remains the same
doubles
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
When the current through the coil of an electromagnet reverses, the
direction of the magnetic field reverses
direction of the magnetic field remains unchanged
magnetic field expands
magnetic field collapses
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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