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Electronic Principles

Electronic Principles
In a step-down transformer, which is larger?

Neither
None of these
Secondary voltage
Primary voltage
Impossible to say

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

200 A
0.083333333333333
2 mA
None of these
0.5 mA

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Electronic Principles
Suppose the peak value of a sinusoidal voltage is 50 V. What is the rms value?

38.74 V
37.4 V
None of these
35.4 V
30.4 V

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Electronic Principles
Which one of the following equations most directly determines the power dissipation of a resistance when you know the voltage drop and amount of resistance?

None of these
P = IE
P = E2/R
I = P/E
P = I2R

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Electronic Principles
A transistor has a current gain of 125 and a base current of 30 µA. What is the collector current?

None of these
3.75 mA
3.2 mA
13 mA
0.05 mA

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Electronic Principles
A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns?

100 A
0.41666666666667
0.1 A
None of these
1000 A

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