Question

alternating and direct current
how does alternating current flow in a circuit?
it is static
it is constant
it oscillates
it cannot exist in a circuit

Explanation:

Alternating current (AC) is defined as an electric current that periodically reverses its direction of flow, meaning it oscillates back and forth in the circuit. The other options are incorrect: static refers to non-moving charge, constant flow describes direct current, and AC is widely used in circuits.

Answer:

it oscillates