In amplitude modulation, the modulation index mu, is kept less than or equal to 1 because.

Options

A. `mu gt 1` will result in interference between carrier frequency and message frequency, resulting into distortion.
B. `mu gt 1` will result in overlapping of both sidebands resulting into loss of information.
C. `mu gt 1` will result in change in phase between carrier signal and message signal.
D. `mu gt 1` indicates amplitude of message signal greater than amplitude of carrier signal resulting into distortion.

Explanation

To understand why the modulation index (μ) in amplitude modulation (AM) is kept less than or equal to 1, let's break down the concept step by step.

### Step 1: Definition of Modulation Index
The modulation index (μ) in amplitude modulation is defined as the ratio of the amplitude of the message signal (Vm) to the amplitude of the carrier signal (Vc). Mathematically, it is expressed as:
\[ \mu = \frac{V_m}{V_c} \]