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Electronic Principles

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

2.02 A
0.995 mA
None of these
157 raA
0.151 mA

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Electronic Principles
The barrier potential accross each depletion layer is

None of these
20 V
0.8 V
0.7 V

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Electronic Principles
Which one of the following equations most directly leads to the resistance of an ordinary household light bulb, assuming that you know the power and voltage rating?

I = P/E
R = E2/P
P = E2/R
None of these
P = PR

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Electronic Principles
If N1/N2 = 2, and the primary voltage is 120 V, what is the secondary voltage?

None of these
0 V
60 V
40 V
36 V

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Electronic Principles
The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio?

4
0.5
0.25
180
None of these

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Electronic Principles
The equivalent of 1 micro A is:

one-millionth of an ampere
10000A
1000 A
one million amperes
None of these

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