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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?

122 W
64 W
None of these
3 W
6 W

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Electronic Principles
Which one of the following properties of a magnetic circuit can be directly compared to current in an electrical circuit?

None of these
Flux density
Reluctance
Number of lines of force
Magnetomotive force

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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
310 Ohm
None of these

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Electronic Principles
A transistor has how many doped regions?

1
2
4
None of these
3

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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?

0.955 A
2.02 A
0.41666666666667
0.02 A
None of these

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Electronic Principles
Most AC power is obtained from:

generators
lightning
oscillators
None of these
batteries

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