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
5 Ohm
None of these
100 Ohm
50 Ohm or more

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Electronic Principles
The dielectric constant of a material is a measure of:

the amount of opposition to the current flow
how well the material concentrates magnetic lines of force
None of these
how well the material concentrates electrostatic lines of force
the amount of voltage it can withstand before breaking down

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Electronic Principles
The peak value of a sine waveform is:

the amplitude at 70.7% of the maximum value
the maximum positive or negative value
None of these
the amplitude at 90% of the maximum value
the amplitude at 1.41 times the maximum value

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Electronic Principles
Which one of the following statements is true for the impedance of a series RC circuit?

None of these
The impedance is greater than the sum of the resistance and capacitive reactance
The impedance is greater than either the resistance or capacitive reactance but less than their sum
The impedance is less than the sum of the resistance and capacitive reactance
The impedance is equal to the sum of the resistance and capacitive reactance

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