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

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

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

The total voltage of a parallel circuit is the same as the voltages across each branch
The total voltage is equal to the sum of the voltages across the individual branches in a parallel circuit
None of these
The total voltage in a parallel circuit is always less than the value of the smallest voltage
The total voltage in a parallel circuit is equal to the average value of the individual voltages

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