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Electronic Principles

Electronic Principles
What is the power dissipation of a resistance that has 24 V dropped across it and 0.25 A flowing through it?

None of these
122 W
64 W
6 W
3 W

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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?

410 Ohm
400 Ohm
550 Ohm
None of these
310 Ohm

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Electronic Principles
A resistor has a rated value of 100 ohm and a tolerance of 10%. What is its minimum and maximum allowable resistance value?

None of these
99 Ohm - 102 ohm
90 Ohm - 101 ohm
90 Ohm - 110 ohm
98 Ohm - 100.1 ohm

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Electronic Principles
How much current flows through a 0.02-H choke that is operating from a 12-V ac, 100-Hz source?

0.02 A
0.955 A
2.02 A
None of these
0.41666666666667

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

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

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Electronic Principles
Doubling the operating frequency of a capacitive circuit:

doubles the amount of a capacitive reactance
has no effect on the capacitive reactance
None of these
cuts the capacitive reactance in half
multiplies the capacitive reactance by 6.28

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