A FM Broad cast transmitter, using modulating signal of frequency 20 kHz has a deviation ratio of 10 . The Bandwidth required for transmission is :

Step-by-step solution

Given FM broadcast Modulating frequency = 20   kHz = f Deviation ratio =   frequency   deviation     modulating   frequency   = ∆ f f ⇒ Frequency deviation, Δ f = f × 10 = 20   kHz × 10 = 200   kHz ⇒ Bandwidth = 2 f + Δ f = 2 20 + 200   kHz = 440   kHz