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Electronic Principles

Electronic Principles
The net charge of a neutral copper atom is

None of these
1
-1
4

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Electronic Principles
The secondary voltage for a certain power transformer is twice the voltage applied to the primary. The current flowing in the secondary winding will be:

None of these
Same as the primary current
One-half the primary current
No more than 10% less than the primary current
Twice the primary current

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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
550 Ohm
310 Ohm
None of these

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Electronic Principles
When the collector current increases, what does the current gain do?

any of the above
decreases
increases
None of these
stays the same

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Electronic Principles
The current gain of a transistor is defined as the ratio of the collector current to the

None of these
emitter current
collector current
supply current
base current

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Electronic Principles
Which one of the following equations most directly determines the power dissipation of a resistance when you know the voltage drop and amount of resistance?

None of these
P = I2R
I = P/E
P = E2/R
P = IE

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