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Electronic Principles

Electronic Principles
The equivalent of 1 micro A is:

one-millionth of an ampere
one million amperes
None of these
1000 A
10000A

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Electronic Principles
The saturation point is approximately the same as

infinity
upper end of the load line
cutoff point
None of these
lower end of the load line

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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
None of these
1000 A
0.41666666666667
100 A

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Electronic Principles
The secondary voltage for a certain power transformer is twice the voltage applied to the primary. The current flowing in the secondary winding will be:

Same as the primary current
No more than 10% less than the primary current
One-half the primary current
Twice the primary current
None of these

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Electronic Principles
What is the power dissipation of a resistance that has 24 V dropped across it and 0.25 A flowing through it?

None of these
3 W
6 W
64 W
122 W

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

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

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