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

Like magnetic poles repel, while unlike poles attract
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

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

The total resistance in a parallel circuit is equal to the average value of the individual resistances
None of these
The total resistance of a parallel circuit is always less than the value of the smallest resistance
The total resistance is equal to the sum of the individual resistances in a parallel circuit.
The total resistance of a parallel circuit is equal to the total voltage

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