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Electronic Principles

Electronic Principles
Who invented the first junction transistor?

Fisher
Smith
None of these
Shockley
Gomes

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Electronic Principles
The rise time of a pulse waveform is the time required for the voltage to rise:

from 10% of the peak value to 90% of the peak value
from zero to its peak value
from 10% of the peak value to 70.7% of the peak value
None of these
from zero to its rms value

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Electronic Principles
How much power is being dissipated by a 1000 W resistance that has 25 V applied to it?

0.24 W
325 kW
0.625 W
None of these
80 W

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

None of these
Wattmeter
Ohmmeter
Ammeter
Voltmeter

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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

None of these
nowhere
down
off the load line
up

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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?

651 V
208 V
707 V
700 V
None of these

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