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Electronic Principles

Electronic Principles
How much current flows through a 60-W light bulb that is operating at 120 V?

0.083333333333333
7200 A
None of these
0.5A
180 A

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Electronic Principles
As the temperature increases, the current gain

can be any of the above
contant
None of these
decreases
increases

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Electronic Principles
A certain power transformer has a turns ratio of 5. What voltage can you expect at the secondary winding when you apply 120 V to the primary winding?

None of these
600 V
0.4 V
24 V
4.73

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Electronic Principles
The direction of electron current flow is:

from positive to negative
from neutral to positive
None of these
from negative to positive
from right to left

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Electronic Principles
Two diodes are in series. The first diode has a voltage of 0.75 V and the second has a voltage of 0.8 V. If the current through the first diode is 500 mA, what is the current through the second diode

10 mA
12 mA
None of these
14 mA
11 mA

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

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

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