Relative permeability of a magnetic material is a ratio of its:
A) absolute permeability to that of a vacuum
B) field intensity to its field density.
C) flux lines to its ampere-turns
D) area to its field density.
Correct Answer:
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Q16: Permanent magnets are characterized by the fact
Q17: The S.I. is the unit of
Q18: A permanent magnet is basically a coil
Q19: The symbol for flux density is:
A) O
B)
Q20: Unlike magnetic poles attract each other, and
Q22: According to Faraday's law, if the rate
Q23: Another name for a hysteresis loop is:
A)
Q24: An example of an electromagnetic device that
Q25: Calculate the induced voltage across a coil
Q26: Magnetic flux lines travel from:
A) north to
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