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

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

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Electronic Principles
The total impedance of a parallel RLC circuit:

is maximum at the resonant frequency
None of these
is equal to the sum of the values of resistance, inductive reactance and capacitive reactance
always increases as the applied frequency increases
always decreases as the applied frequency increases

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