Q160 / 160 · TS EAMCET 2020 (09 Sep Shift 1) · Physics

A carrier signal of frequency v1 and peak voltage of V1 is modulated by a message signal of frequency v2 and peak voltage of V2. Let m be the modulation index and v+,v- be side bands produced. The correct statement is

  • A
    m=V1V2
  • Correct answer
    B
    v1=v++v-2
  • C
    v2=v++v-2
  • D
    m>V2V1

Solution

Given: For carrier signal

Frequency v1 and peak voltage V1

For message signal

Frequency v2 and peak voltage V2

The modulation index m is defined as the ratio of modulation voltage to the carrier voltage. Thus, m=V2V1.

The frequency of the carrier signal is given as, v1=v++v-2

Hence, the correct answer is option: 'B'.

Relevant Questions