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Electronic Principles

Electronic Principles
Most AC power is obtained from:

generators
batteries
oscillators
lightning
None of these

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Electronic Principles
If the current gain is 200 and the collector current is 100 mA, the base current is

0.5 mA
None of these
200 A
2 mA
0.083333333333333

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Electronic Principles
What is the turns ratio for the transformer specified in the above question?

None of these
0.575
1.5
0.707
10.738

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Electronic Principles
The net charge of a neutral copper atom is

1
4
None of these
-1

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Electronic Principles
Which one of the following statements regarding ac circuits is correct?

Current lags the voltage through a resistor
Current leads the voltage through a resistor
All of these
None of these
Current and voltages are in phase through a resistor

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Electronic Principles
What is the inductive reactance of a 2-H coil operating at 60 Hz?

120 Ohm
754 Ohm
60 Ohm
30 Ohm
None of these

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