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Electronic Principles

Electronic Principles
The basic unit of measurement for resistance is the:

None of these
watt
ampere
volt
ohm

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Electronic Principles
A power transformer steps 100 V down to 10 V. If the current in its primary winding is 2 A, what is the current in the secondary winding?

0.20833333333333
20 A
50 A
None of these

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Electronic Principles
Positive ions are atoms that have

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

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Electronic Principles
At room temperature a conductor has low many holes?

Same number as free electrons
less than the free electrons
None of these
many
Only those produced by thermal energy

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

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

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Electronic Principles
A zener diode has a voltage of 10 V and a current of 20 mA. What is the power dissipation?

10 mW
300 mW
None of these
20 mW
200 mW

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