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Electronic Principles

Electronic Principles
Which is the most widely used semiconductor?

All of these
Copper
None of these
Germanium
Silicon

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Electronic Principles
Doubling the number of turns of wire in an inductor:

reduces the value of inductance by one-half
multiplies the value of inductance by four
multiplies the value of inductance by two
reduces the value of inductance by one-fourth
None of these

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Electronic Principles
How much current flows through a 60-W light bulb that is operating at 120 V?

0.083333333333333
0.5A
180 A
None of these
7200 A

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Electronic Principles
Inductive reactance is measured in units of:

henrys
Ohm
amperes per second
volts per second
None of these

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Electronic Principles
What form of energy is used to maintain an imbalance of charges between the terminals of a battery?

Electronical energy
Solar energy
None of these
Chemical energy
Mechanical energy

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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?

None of these
410 Ohm
400 Ohm
310 Ohm
550 Ohm

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