Question

Which device most likely uses only alternating current?

1.a smartphone.
2.a digital wristwatch.
3.a magnetic compass.
4.a large flat screen television.

Answer 1

A large flat screen television most likely uses only alternating current, as it is designed to be plugged into a wall socket which provides AC.

Step-by-step explanation:

Within the devices listed, a large flat screen television most likely uses only alternating current (AC). This is because televisions are typically designed to be plugged into wall sockets, which provide an alternating current from the power grid. Smartphones and digital wristwatches generally operate on direct current (DC) and often have internal batteries or use transformers to convert AC from wall sockets to DC for charging. A magnetic compass does not use electricity; it operates based on the Earth's magnetic field.