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Electronic Principles

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

generator
None of these
thermocouple
solar cell
chemical cell

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Electronic Principles
The voltage across a 1N4001 is 0.93V when the current is 1A. What is the power dissipation of the diode for these values?

0.041666666666667
0.93 V
None of these
9.3 W
0.93 W

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Electronic Principles
Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current?

0.4 A
0.6 A
0.3 A
0.2 A
None of these

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Electronic Principles
Assuming 100% efficiency, what is the power being applied to the primary winding of the transformer described in the above question?

20 W
100 W
200 W
1000 W
None of these

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Electronic Principles
In a transistor operates at the middle of the load line, an increase in the base resistance will move the Q point

off the load line
nowhere
None of these
up
down

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

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

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