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?

0.17 V
None of these
10.17 V
20 V
18.8 V

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Electronic Principles
Which one of the following statements best describes magnetic hysteresis?

Hysteresis is most apparent when the core material is saturated
Hysteresis is the amount of magnetic flux that is not confined to the core material of an electromagnet
Hysteresis is most apparent when a steady amount of current is lowing through the coil of an electromagnet
None of these
Hysteresis is most apparent when the current through the coil of an electromagnet changes frequently

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

The same current always flows through every part of a parallel circuit
None of these
The amount of current flow through each branch of a parallel circuit can be different, depending on the resistance of each branch part and the amount of voltage applied to it
The total current in a parallel circuit is equal to the total voltage multiplied by the total resistance
The total current in a parallel circuit is always less than the smallest amount of current

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Electronic Principles
The period of a waveform is:

equal to 0.707 times the peak amplitude
the time required for the voltage to rise from 10% to 90% of the peak amplitude
the number of cycles completed in one second
None of these
the time required to complete one full cycle

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

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 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 same current flows through every part of a series circuit
The total current in a series circuit is equal to the total voltage multiplied by the total resistance

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