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Electronic Principles

Electronic Principles
The rotating coil of wire in an electric motor is called the:

loop
None of these
commutator
brush
armature

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Electronic Principles
Doubling the diameter of the coil in an inductor:

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

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

solar cell
None of these
electric device
thermocouple
chemical cell

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Electronic Principles
The basic unit of measurement for current is the:

ampere
ohm
None of these
volt
watt

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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

75 degree
None of these
45 degree
30 degree
180 degree

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Electronic Principles
Which one of the following devices is most often used for measuring electrical potential difference?

Wattmeter
None of these
Ohmmeter
Voltmeter
Ammeter

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