4: Flashback Friday - Electrical (Part Two)

Front

The National Electrical Code (NEC) requires that all switching be done in the _________ circuit conductor. This means that when wiring switches, you should only connect them to the "hot" wire (the ungrounded conductor) and not to the neutral (grounded) wire.

Back

ungrounded

Front

What is the primary function of a potentiometer in an electrical circuit?

Back

To adjust the resistance and control voltage or current flow

Front

What is the meaning of the colors on a resistor?

Back

The value of resistance in the resistor

Front

If a resistor has the color bands: red, red, brown, gold, what is its resistance value?

Back

220 ohms with a tolerance of ±5%

Front

A resistor has the color bands: yellow, violet, orange, silver. What is its resistance value?

Back

47 kOhms

Front

What color bands will a resistor with a value of 23 k ohms +/- 5% have?

Back

red, orange, orange, gold

Front

What is the minimum value in the tolerance range of a resistor with color code Brown-Red-Brown?

Back

116 Ω

Front

What is the multiplier for color Green?

Back

x100,000

Front

The time it takes to complete one full cycle of an AC waveform is known as the ________.

Back

period

Front

What does an oscilloscope show?

Back

Voltage versus time