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

Current flowing through a conductor generates a magnetic field
None of these
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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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 greater than 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

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