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Electronic Principles

Electronic Principles
A zener diode has a voltage of 10 V and a current of 20 mA. What is the power dissipation?

300 mW
None of these
10 mW
200 mW
20 mW

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Electronic Principles
What is the capacitive reactance of a 0.1 micro F capacitor that is operating at 1000 Hz?

1590 Ohm
690 Ohm
312 Ohm
None of these
less than 1 Ohm

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Electronic Principles
How many protons does the nucleus of a silicon atom contain?

48
14
None of these
4
29

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Electronic Principles
Which one of the following devices is most often used for measuring electrical potential difference?

Ammeter
None of these
Wattmeter
Voltmeter
Ohmmeter

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Electronic Principles
A power transformer steps 100 V down to 10 V. If the current in its primary winding is 2 A, what is the current in the secondary winding?

50 A
None of these
0.20833333333333
20 A

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

157 raA
None of these
2.02 A
0.995 mA
0.151 mA

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