Electronic Principles
What is the total resistance of a parallel circuit that contains two resistors having values of 220 ohm and 470 ohm?

690 ohm
220 ohm
445 ohm
None of these
150 ohm

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

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
Like magnetic poles repel, while unlike poles attract

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Electronic Principles
The rms value of a sine waveform is:

the time required to complete one full cycle
None of these
equal to 1.41 times the peak amplitude
the number of cycles completed in one second
equal to 0.707 times the peak amplitude

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