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Electronic Principles

Electronic Principles
If N1/N2 = 2, and the primary voltage is 120 V, what is the secondary voltage?

None of these
36 V
40 V
0 V
60 V

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Electronic Principles
The merging of a free electron and a hole is called

None of these
Lifetime
Thermal energy
Covalent bonding
Recombination

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Electronic Principles
A zener regulator has an input voltage from 15 to 20 V and a load current from 5 to 20 mA. If the zener voltage is 6.8 V, what value should the series resistor have?

400 Ohm
410 Ohm
None of these
310 Ohm
550 Ohm

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Electronic Principles
A dielectric material is:

a good conductor of magnetic fields
a good conductor
a good insulator
a poor conductor of electrostatic fields
None of these

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Electronic Principles
How may valence electrons does a silicon atom have?

None of these
4
1
2

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Electronic Principles
Suppose a voltage source has an ideal voltage of 12V and an internal resistance of 0.5W. For what values of load resistance will the voltage source appear stiff?

None of these
5 Ohm
6 Ohm
100 Ohm
50 Ohm or more

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