Electronic Principles
A device that converts chemical energy to electrical energy is called a:

chemical cell
None of these
solar cell
electric device
thermocouple

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Electronic Principles
The total impedance of a parallel RLC circuit:

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

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Electronic Principles
Which one of the following phrases most accurately describes a purely inductive circuit?

Resistances provide the only opposition to current flow
Combinations of resistance and inductive reactance provide any opposition to current flow
None of these
The ac voltage lags the current by 90 degree
Inductive reactance provides the only opposition to current flow

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

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

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