Question

An amplitude modulated wave is represented by the expression v_m = 5(1 + 0.6 cos 6280 t) sin(211 × 10⁴ t) volts. The minimum and maximum amplitudes of the amplitude modulated wave are, respectively:

Options

• `3/2` V, 5V

• `5/2` V, 8V

• 5V, 8V

• 3V, 5V

Answer 1

3V, 5V

Explanation:

A charge is induced on the earth's surface during radio wave propagation, which takes the form of current as the wave travels. Because the earth provides resistance to the flow of generated current, the waves are weakened.