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Electronic Principles

Electronic Principles
The barrier potential accross each depletion layer is

None of these
0.7 V
20 V
0.8 V

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Electronic Principles
A step-down transformer has turns ration of 5:1. If the primary voltage is 120 Vrms, what is the secondary voltage?

30 V
18 V
12 V
24 V
None of these

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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
0.151 mA
0.995 mA
2.02 A
None of these

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Electronic Principles
A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage?

None of these
651 V
707 V
208 V
700 V

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Electronic Principles
A device that converts thermal energy to electrical energy is called a:

thermocouple
None of these
piezoelectric devices
chemical cell
solar cell

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Electronic Principles
1 Microfarad is the same as:

1 million picofarads
None of these
1 million farads
1000 millifarads
1 millionth of a picofarad

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