Electronic Principles
Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it?

I = E/R
None of these
I = ER
E = PR
E = I2R

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Electronic Principles
The rms value of a sine waveform is:

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

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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
Like magnetic poles attract, while unlike poles repel
Current flowing through a conductor generates a magnetic field
None of these

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