Electronic Principles
Suppose the zener diode has a breakdown voltage of 10 V and zener resistance of 8.5 W, what is the additional voltage when the current is 20 mA?

10.17 V
18.8 V
20 V
0.17 V
None of these

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

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

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Electronic Principles
What is a free electron?

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

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