Electronic Principles
Which one of the following equations most directly leads to the resistance of an ordinary household light bulb, assuming that you know the power and voltage rating?

I = P/E
P = PR
None of these
P = E2/R
R = E2/P

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

The voltage always has the same amplitude and phase for every part of the circuit
The total voltage is equal to the sum of the voltages across the resistance and capacitance
The total voltage is less than the sum of the voltages across the resistance and capacitance
None of these
The total voltage is greater than the sum of the voltages across the resistance and capacitance

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Electronic Principles
Which one of the following statements most accurately reflects the nature of ac power?

The current in an ac circuit flows in one direction, but changes value periodically
The current in an ac circuit changes direction periodically
None of these
The current in an ac circuit flows in two directions at the same time
The current in an ac circuit flows in one direction at a steady level

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

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
the amount of opposition to the current flow

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