Electronic Principles
What is the smallest number of polarities required for current flow?

Three - negative, positive and neutral terminals
Four - two negative and two positive
Two - a negative terminal and a positive terminal
None of these
One - a negative terminal

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Electronic Principles
Which one of the following statements is true for the currents in a parallel RL circuit?

The total current is equal to the sum of the currents through the resistance and inductance
The total current is less than the sum of the currents through the resistance and inductance
The current always has the same amplitude and phase for every part of the circuit
The total current leads the total voltage by less than 90
None of these

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Electronic Principles
The total inductive reactance of a parallel inductor circuit is:

None of these
equal to the source voltage divided by total current
less than the inductance value of the smallest inductor
equal to the sum of the individual inductance values
equal to the sum of the individual inductive-reactance values

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