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

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

None of these
The same current flows through every part of a series circuit
The total current in a series circuit is equal to the sum of the currents flowing through the individual components in the circuit
The total current in a series circuit is equal to the total voltage multiplied by the total resistance
The amount of current flow through each part of a series circuit can be different, depending on the resistance of each part and the amount of voltage applied to it

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Electronic Principles
Which one of the following phrases most accurately describes a purely capacitive circuit?

Capacitive reactance provides the only opposition to current flow
None of these
Resistances provide the only opposition to current flow
Combinations of resistance and capacitive reactance provide any opposition to current flow
The ac voltage leads the current by 90 degree

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