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Electronic Principles

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

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

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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?

13 mA
0.05 mA
3.75 mA
3.2 mA
None of these

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Electronic Principles
Two diodes are in series. The first diode has a voltage of 0.75 V and the second has a voltage of 0.8 V. If the current through the first diode is 500 mA, what is the current through the second diode

12 mA
14 mA
None of these
10 mA
11 mA

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Electronic Principles
A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

3 V
16 V
7.5 V
None of these
8 V

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Electronic Principles
If a load resistance is 1 kW, a stiff current source has a resistance of

None of these
More than 100 k Ohm
At least 10 Ohm
Less than 10 Ohm
Less than 100 k Ohm

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Electronic Principles
Reducing the amount of current through an inductor:

has no effect on the inductance
multiplies the value of inductance by two
None of these
multiplies the value of inductance by four
reduces the value of inductance by one-half

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