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?

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

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Electronic Principles
In a pure inductor:

ac current lags the voltage by 90 degree
ac current leads the voltage by 90 degree
ac current is converted to dc voltage
ac current and voltage are exactly in phase
None of these

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Electronic Principles
What is the difference between a conductor and an insulator?

An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all
None of these
A conductor allows current to flow much easier than an insulator does
The difference between conductors and insulators depends on how they are used
An insulator allows current to flow much easier than a conductor does

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