(B) The modulation index $\mu$ (or $m_a$) for an $AM$ wave is given by the formula:$\mu = \frac{E_{\max} - E_{\min}}{E_{\max} + E_{\min}}$Given:$E_{\m

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(B) The modulation index $\mu$ (or $m_a$) for an $AM$ wave is given by the formula:$\mu = \frac{E_{\max} - E_{\min}}{E_{\max} + E_{\min}}$Given:$E_{\max} = 90 \ V$$E_{\min} = 10 \ V$Substituting the values:$\mu = \frac{90 - 10}{90 + 10} = \frac{80}{100} = 0.8$To express this as a percentage:$\mu \% = 0.8 \times 100\% = 80\%$Therefore, the modulation index is $80\%$.

Class 12 Physics Communication Communication

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The maximum amplitude of an $AM$ wave is $90 \ V$ and the minimum amplitude is $10 \ V$. What is the modulation index of the $AM$ wave in percentage?

A
$10$
B
$80$
C
$90$
D
$100$

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Match Column $A$ (layers in the ionosphere for skywave propagation) with Column $B$ (their height range).
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$A$. $D$-layer $I$. $250-400 \ km$
$B$. $E$-layer $II$. $170-190 \ km$
$C$. $F_1$-layer $III$. $95-120 \ km$
$D$. $F_2$-layer $IV$. $65-75 \ km$

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The ionosphere acts as a reflector for which frequency range?

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Column $A$	Column $B$
$A$. $D$-layer	$I$. $250-400 \ km$
$B$. $E$-layer	$II$. $170-190 \ km$
$C$. $F_1$-layer	$III$. $95-120 \ km$
$D$. $F_2$-layer	$IV$. $65-75 \ km$

The maximum amplitude of an $AM$ wave is $90 \ V$ and the minimum amplitude is $10 \ V$. What is the modulation index of the $AM$ wave in percentage?

Similar Questions

Match Column $A$ (layers in the ionosphere for skywave propagation) with Column $B$ (their height range).Column $A$Column $B$$A$. $D$-layer$I$. $250-400 \ km$$B$. $E$-layer$II$. $170-190 \ km$$C$. $F_1$-layer$III$. $95-120 \ km$$D$. $F_2$-layer$IV$. $65-75 \ km$

In the process of modulation,the audio waves are called ...........

$A$ square wave of the modulating signal is shown in the figure. The carrier wave is given by $C(t) = 5 \sin(8\pi t) \text{ V}$. The modulation index is:

An antenna is a device:

The ionosphere acts as a reflector for which frequency range?

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Match Column $A$ (layers in the ionosphere for skywave propagation) with Column $B$ (their height range).
Column $A$ Column $B$
$A$. $D$-layer $I$. $250-400 \ km$
$B$. $E$-layer $II$. $170-190 \ km$
$C$. $F_1$-layer $III$. $95-120 \ km$
$D$. $F_2$-layer $IV$. $65-75 \ km$