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Electronic Principles

Electronic Principles
The net charge of a neutral copper atom is

4
None of these
-1
1

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Electronic Principles
Which one of the following kinds of materials has the lowest permeability?

None of these
A diamagnetic material
A paramagnetic material
All of these
A feiTomagnetic material

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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

14 mA
12 mA
10 mA
None of these
11 mA

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Electronic Principles
How many types of flow are there in a semiconductor?

1
None of these
2
3

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

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Electronic Principles
What is the smallest number of polarities required for current flow?

None of these
One - a negative terminal
Two - a negative terminal and a positive terminal
Three - negative, positive and neutral terminals
Four - two negative and two positive

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