Electronic Principles
Which one of the following statements regarding ac circuits is correct?

All of these
Current and voltages are in phase through a resistor
Current leads the voltage through a resistor
None of these
Current lags the voltage through a resistor

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

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

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Electronic Principles
Which one of the following principles best describes the basic operation of an electromagnet?

None of these
Current flowing through a conductor generates a magnetic field
Like magnetic poles attract, while unlike poles repel
Current is induced in a conductor that is moving through a magnetic field
Like magnetic poles repel, while unlike poles attract

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