Electronic Principles
A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns?

1000 A
None of these
100 A
0.41666666666667
0.1 A

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Electronic Principles
When a series RLC circuit is operating at its resonant frequency:

inductive reactance is equal to the capacitive reactance
the difference between inductive and capacitive reactance is equal to the resistance
None of these
capacitive reactance is greater than the inductive reactance
inductive reactance is greater than the capacitive reactance

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Electronic Principles
Current is

The force that causes electrons to flow
None of these
The number of free electrons in an atom
The flow of charged particles through a material
An imbalance of electrical charges

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