Residential Wiring Chap.4 Flashcard

Front

What causes distortion of the voltage and current A.C waveforms?

Back

Harmonics

Front

Is it true that one megohm is equal to ohms?

Back

False

Front

Should you always read and follow the operating instructions that come with a voltmeter?

Back

True

Front

What is the term for the number of times per second that alternating current changes direction?

Back

Frequency

Front

What device can indicate that voltage is present on a circuit without being connected to it?

Back

Non-contact voltage tester

Front

What is the unit of electrical resistance?

Back

Ohm

Front

What is the purpose of a multimeter?

Back

To measure voltage, current, and resistance.

Front

What does a voltmeter measure?

Back

Voltage.

Front

What does an ammeter measure?

Back

Current.

Front

What is the difference between AC and DC?

Back

AC (Alternating Current) changes direction periodically, while DC (Direct Current) flows in one direction.