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Electronic Principles

Electronic Principles
How may valence electrons does a silicon atom have?

2
1
None of these
4

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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 zero to its rms value
from 10% of the peak value to 90% of the peak value

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Electronic Principles
When operating above its resonant frequency, a parallel RLC circuit has the characteristics of a:

None of these
parallel RLC circuit operated above its resonant frequency
purely resistive circuit
parallel RL circuit
parallel RC circuit

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Electronic Principles
What is one important thing transistors do?

Rectify line voltage
Emit light
Regulate voltage
Amplify weak signals
None of these

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Electronic Principles
If the base supply voltage increases, the Q point moves

off the load line
up
nowhere
None of these
down

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Electronic Principles
An audio transformer has a turn ratio of 9, What is its impedance ratio?

85
9
6
None of these
81

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