Electronic Principles
What form of energy is used to maintain an imbalance of charges between the terminals of a battery?

Mechanical energy
Electronical energy
Solar energy
Chemical energy
None of these

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

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

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Electronic Principles
Current is

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

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

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

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