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Electronic Principles

Electronic Principles
Positive ions are atoms that have

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

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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?

0.41666666666667
0.1 A
1000 A
None of these
100 A

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Electronic Principles
The equivalent of 1 megohms is:

one million ohms
1 k ohm
one-millionth of an ohm
None of these
100,000 ohm

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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
0.02 A
0.41666666666667
0.955 A
None of these

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Electronic Principles
Suppose a voltage source has an ideal voltage of 12V and an internal resistance of 0.5W. For what values of load resistance will the voltage source appear stiff?

6 Ohm
100 Ohm
50 Ohm or more
5 Ohm
None of these

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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

10 mA
12 mA
None of these
11 mA
14 mA

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