Q160 / 160 · TS EAMCET 2018 (04 May Shift 1) · Physics

A carrier wave of peak voltage $20 V$ is used to transmit a message signal. For getting a modulation index of $60 %$ , the peak voltage of the modulating signal is

A
$6 V$
B
$8 V$
Correct answer
C
$12 V$
D
$33.3 V$

Solution

$μ = \frac{A_{m}}{A_{c}}$

$\Rightarrow 60 % = \frac{A_{m}}{20}$

$∴ A_{m} = 12 V$

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

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