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Electronic Principles

Electronic Principles
Holes act like:

None of these
Atoms
Negative charges
Positive charges
Crystals

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Electronic Principles
A zener regulator has an input voltage from 15 to 20 V and a load current from 5 to 20 mA. If the zener voltage is 6.8 V, what value should the series resistor have?

550 Ohm
410 Ohm
400 Ohm
None of these
310 Ohm

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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?

None of these
0.151 mA
0.995 mA
157 raA
2.02 A

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

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

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Electronic Principles
A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns?

0.1 A
100 A
1000 A
0.41666666666667
None of these

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

2.02 A
None of these
0.955 A
0.41666666666667
0.02 A

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