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Electronic Principles

Electronic Principles
Positive ions are atoms that have

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

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Electronic Principles
Holes are the minority carriers in which type of semiconductor?

Intrinsic
p-type
None of these
Extrinsic
n-type

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Electronic Principles
The direction of conventional current flow is:

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

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Electronic Principles
Doubling the diameter of the coil in an inductor:

reduces the value of inductance by one-fourth
None of these
multiplies the value of inductance by four
multiplies the value of inductance by two
reduces the value of inductance by one-half

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Electronic Principles
Suppose the zener diode has a breakdown voltage of 10 V and zener resistance of 8.5 W, what is the additional voltage when the current is 20 mA?

20 V
None of these
0.17 V
18.8 V
10.17 V

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Electronic Principles
A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current?

208 mA
300 mA
None of these
200 mA
7.8 mA

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