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Electrical Engineering - Magnetism and Electromagnetism

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You can easily solve all kind of Electrical Engineering questions based on Magnetism and Electromagnetism by practicing the objective type exercises given below, also get shortcut methods to solve Electrical Engineering Magnetism and Electromagnetism problems.

Home » Engineering » Electrical Engineering » Magnetism and Electromagnetism » General Questions

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
A. increases
B. decreases
C. remains constant
D. reaches zero

Answer: Option A

Explanation:

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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
A. 1,000 V
B. 2,000 V
C. 31.25 V
D. 3,125 V

Answer: Option B

Explanation:

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3. 

For a given wirewound core, an increase in current through the coil
A. reverses the flux lines
B. decreases the flux density
C. increases the flux density
D. causes no change in flux density

Answer: Option C

Explanation:

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4. 

If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density
A. increases
B. decreases
C. remains the same
D. doubles

Answer: Option B

Explanation:

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5. 

When the current through the coil of an electromagnet reverses, the
A. direction of the magnetic field reverses
B. direction of the magnetic field remains unchanged
C. magnetic field expands
D. magnetic field collapses

Answer: Option A

Explanation:

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