Alternating current and voltage (AC), rather than direct current and voltage (DC), are used for domestic electrical power. The reason for this is based on one of the following physical principles. Which one?
A) Opposite electric charges attract each other, and like charges repel each other.
B) When the number of magnetic field lines passing through a circuit changes, a voltage is generated in the circuit.
C) When a current flows through a wire, a magnetic field is created.
D) When a current flows through a resistance, heat is generated.
E) When a current-carrying wire is placed in a magnetic field, it may experience a force if properly oriented.

Question

Quizplus · Accepted Answer

Alternating current (AC) is used for domestic electrical power primarily because of the principle of electromagnetic induction, as described in option B. This principle allows for the efficient generation and transmission of electricity over long distances. AC can be easily transformed to higher or lower voltages, which reduces energy loss during transmission.

Alternating Current and Voltage (AC), Rather Than Direct Current and Voltage