Electronic Principles
Which one of the following is a direct statement of Ohm's law?

None of these
The algebraic sum of currents entering and leaving a point is equal to zero
The algebraic sum of voltages in a loop is equal to zero
The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it
The total resistance of a parallel circuit is less than the value of the smallest resistance

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Electronic Principles
The rms value of a sine waveform is:

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

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Electronic Principles
Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage?

The voltage remains at one polarity but changes value periodically
The voltage causes current to flow in two directions at the same time
None of these
The voltage reverses polarity periodically
The voltage remains at one polarity and at a steady level

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

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