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Electronic Principles

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

generator
chemical cell
None of these
solar cell
thermocouple

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Electronic Principles
If a transistor operates at the middle of the load line, an increase in the current gain will move the Q point

off the load line
up
down
nowhere
None of these

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Electronic Principles
When the collector current increases, what does the current gain do?

stays the same
any of the above
decreases
increases
None of these

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

loop
commutator
armature
None of these
brush

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Electronic Principles
A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage?

208 V
651 V
None of these
707 V
700 V

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