Electronic Principles
An unloaded zener regulator has a source voltage of 20 V, a series resistance of 330 W, and a zener voltage of 12 V, What is the Zener current?

68.4 mA
24.2 mA
28.4 mA
None of these
34.4 mA

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

The amount of current flow through each part of a series circuit can be different, depending on the resistance of each part and the amount of voltage applied to it
The total current in a series circuit is equal to the total voltage multiplied by the total resistance
The total current in a series circuit is equal to the sum of the currents flowing through the individual components in the circuit
None of these
The same current flows through every part of a series circuit

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Electronic Principles
When a series RLC circuit is operating at its resonant frequency:

None of these
capacitive reactance is greater than the inductive reactance
inductive reactance is equal to the capacitive reactance
inductive reactance is greater than the capacitive reactance
the difference between inductive and capacitive reactance is equal to the resistance

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

The total voltage is equal to 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
The total voltages is less than the sum of the voltages across the resistance and inductance
None of these
The total voltage lags the total current by less than 90

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