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Electronic Principles

Electronic Principles
A device that converts mechanical into electrical energy is?

generator
solar cell
chemical cell
None of these
thermocouple

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Electronic Principles
What is the phase shift between total current and voltage in the circuit of a 100 ohm resistor connected in parallel with a capacitor that has a reactance of 100 ohm

30 degree
None of these
180 degree
75 degree
45 degree

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Electronic Principles
What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with an inductor that has a reactance of 200 W?

77.7 ohm
89.3 ohm
88.8 ohm
224 ohm
None of these

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Electronic Principles
Doubling the number of turns of wire in an inductor:

multiplies the value of inductance by four
reduces the value of inductance by one-half
reduces the value of inductance by one-fourth
multiplies the value of inductance by two
None of these

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Electronic Principles
The emitter diode is usually

None of these
Operating in the breakdwon region
Nonconducting
Forward-biased
Reverse-biased

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Electronic Principles
Suppose a voltage source has an ideal voltage of 15V and a source resistance of 0.2W. For what values of load resistance will the voltage source appear stiff?

100 Ohm
20 Ohm
10 Ohm
None of these
30 Ohm

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