Which statement is true about AC?

A). The electrons move back and forth

B). The + / - polarity is constant

C). It is most common in portable devices

D). It can produce only low voltages

Question

Physics

Mariah Campbell

26 February, 06:27

Which statement is true about AC?

A). The electrons move back and forth

B). The + / - polarity is constant

C). It is most common in portable devices

D). It can produce only low voltages

+1

Answers (1)

Know the Answer?

Camilla Lin · Answer 1

In a wire carrying Alternating Current, the electrons move "back and forth", first toward one end of the wire, then toward the other end of the wire. (A)

The + / - polarity of AC is constantly reversing. (B)

AC is most commonly used to power devices that plug into a wall outlet, and very very very seldom to power portable devices. (C)

AC is used at voltages anywhere between several hundred-thousand volts for long-distance interstate power transmission, to 3 or 4 volts coming out of a "wall wart" AC adapter in the house. (D). Voltage of an AC is easily shifted with a transformer, whereas transformers can't be used for DC.

Which statement is true about AC?A). The electrons move back and forthB). The + / - polarity is constantC). It is most common in portable devicesD). It can produce only low voltages

Which statement is true about AC?

A). The electrons move back and forth

B). The + / - polarity is constant

C). It is most common in portable devices

D). It can produce only low voltages