What is the device that is basically a switch with contacts that are opened or closed by an electromagnet?
A) Compass
B) Relay
C) Solenoid
D) Tape recorder
Correct Answer:
Verified
Q10: _ field lines are unaffected by nonmagnetic
Q11: What are the base units for permeability?
A)
Q12: What maintains the strength of the permanent
Q13: What are the two classes of magnets?
A)
Q14: The wire wrapped in a form of
Q16: The point at which a magnetic material
Q17: In terms of molecular structure, iron atoms
Q18: What device concentrates the magnetic field of
Q19: Preventing one component from affecting another through
Q20: The best shield for a component in
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