The magnetic field around an electromagnet is produced by .
A) the laminated iron core
B) a current flowing through the winding
C) the conductor's permeability
D) a permanent magnet
Correct Answer:
Verified
Q19: If two north magnetic poles are brought
Q20: Permeability is _. Q21: The permeability of air is . Q22: In which one of the following applications Q23: The magnetic term that is equivalent to Q25: The quantity of lines of force per Q26: If a basic one -loop, dc generator Q27: If a tape recorder's output voltage increases Q28: If a relay picks up and makes Q29: If the cross -sectional area of a
A)22
B)7
C)19.2
D)1
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