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Electronic Principles

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

photo transistor
photodiode
None of these
solar cell
thermocouple

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Electronic Principles
What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W?

0 degree
90 degree
26.6 degree
180 degree
None of these

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Electronic Principles
Which one of the following properties of a magnetic circuit can be directly compared to resistance in an electrical circuit?

Permeance
Permeability
Retentivity
Reluctance
There is no valid comparison

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Electronic Principles
A zener diode has a voltage of 10 V and a current of 20 mA. What is the power dissipation?

200 mW
10 mW
300 mW
None of these
20 mW

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

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

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

None of these
piezoelectric device
photodiode
solar cell
nicad cell

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