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Electronic Principles

Electronic Principles
Positive ions are atoms that have

Gained an electron
None of these
Lost an electron
Gained a proton
Lost a proton

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Electronic Principles
Which one of the following equations most directly determines the power dissipation of a resistance when you know the power dissipation of a resistance when you know the voltage drop and current?

None of these
P = I2R
P = IE
P = E2/R
I = P/E

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

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Electronic Principles
Suppose a voltage source has an ideal voltage of 12V and an internal resistance of 0.5W. For what values of load resistance will the voltage source appear stiff?

6 Ohm
100 Ohm
50 Ohm or more
5 Ohm
None of these

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Electronic Principles
How much current flows through a 0.02 micro F capacitor that is operating from a 12-V ac, 100-Hz source?

2.02 A
157 raA
None of these
0.995 mA
0.151 mA

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Electronic Principles
If a load resistance is 1 kW, a stiff voltage source has a resistance of

At least 10 Ohm
Less than 100 k Ohm
None of these
More than 100 k Ohm
less than 10 Ohm

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