Question

The transmission system at a radio station uses a/an _____ to convert s direct current into a high frequency alternating current.

Answer 1

The transmission system at a radio station uses an oscillator to convert direct current into a high frequency alternating current.

Answer 2

Oscillator

Reason

Oscillators is a circuit that changes direct current from to alternating current (AC) signal.

Oscillator often produces periodic, oscillating electronic signal, a sine wave or a square wave.

Therefore an oscillator is used to convert direct current into a high frequency alternating current.