CUET Preparation Today
A carrier wave of peak voltage 14 V is used to transmit a message. What should be the peak voltage of the modulating signal in order to have a modulation index of 70%? |
20.0 V 2.0 V 9.8 V 4.2 V |
9.8 V |
The correct answer is Option (3) → 9.8 V The modulation index (m), $m=\frac{V_m}{V_c}$ M = 70% = 0.7 $⇒V_m=m.V_c$ $=0.7×14=9.8V$ |
