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Electrical Engineering - Magnetism and Electromagnetism

Exercise : Magnetism and Electromagnetism - General Questions
11.
There is 900 mA of current through a wire with 40 turns. What is the reluctance of the circuit if the flux is 400 Wb?
14,400 At/Wb
1,440 At/Wb
9,000 At/Wb
90,000 At/Wb
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
A basic one-loop dc generator is rotated at 90 rev/s. How many times each second does the dc output voltage peak (reach maximum)?
90
180
270
360
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
What is the flux density in a magnetic field in which the flux in 0.1 m2 is 600 Wb?
6,000 T
600 T
600 T
6 T
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
The unit for permeability is
Wb/At × m
At/m
At/Wb
Wb
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it?
18.75 At
30 At
300 At
187 At
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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