Electronic Principles
What is a free electron?

An electron that has been freed from its parent atom
An electron that costs nothing
An electron that has no electrical charge
An electron that has twice the amount of charge of a normal electron
None of these

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Electronic Principles
In a pure inductor:

ac current lags the voltage by 90 degree
None of these
ac current and voltage are exactly in phase
ac current is converted to dc voltage
ac current leads the voltage by 90 degree

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

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

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