An antenna current of an AM broadcast transmi | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The total antenna current $I_t$ in an $AM$ transmitter is given by the formula: $I_t = I_c \sqrt{1 + \frac{m_a^2}{2}}$,where $I_c$ is the carrier

Vedclass · Accepted Answer

$10.35$

Vedclass · Answer

(A) The total antenna current $I_t$ in an $AM$ transmitter is given by the formula: $I_t = I_c \sqrt{1 + \frac{m_a^2}{2}}$,where $I_c$ is the carrier current and $m_a$ is the modulation index.Given: $I_t = 11\, A$ and $m_a = 50\% = 0.5$.Substituting the values into the formula:$11 = I_c \sqrt{1 + \frac{(0.5)^2}{2}}$$11 = I_c \sqrt{1 + \frac{0.25}{2}}$$11 = I_c \sqrt{1 + 0.125}$$11 = I_c \sqrt{1.125}$$11 = I_c 	imes 1.06066$$I_c = \frac{11}{1.06066} \approx 10.37\, A$.Rounding to the nearest provided option,the carrier current is $10.35\, A$.

An antenna current of an $AM$ broadcast transmitter modulated by $50\%$ is $11\, A$. The carrier current is.........$A$.

Similar Questions

In satellite communication,the $6\,\text{GHz}$ frequency is used for........... and the $4\,\text{GHz}$ frequency is used for...........

In $AM$ transmission,the bandwidth of transmission is $10 \, kHz$ and the carrier frequency is $100 \, kHz$. The sideband frequencies are given by:

$A$ baseband signal of $3.5\, MHz$ frequency is modulated with a carrier signal of $3.5\, GHz$ frequency using amplitude modulation. What should be the minimum size of antenna required to transmit the modulated signal?

An amplitude modulated wave is represented by $c_m(t)= 10[1+0.6 \sin (1250 t)] \sin (10^8 t)$. Then the modulation index is

If a carrier wave $C(t) = A \sin \omega_c t$ is amplitude modulated by a modulating signal $m(t) = A \sin \omega_m t$,then the equation of the modulated signal $[C_m(t)]$ and its modulation index are respectively:

Vedclass Test Series

Exam Paper Generator

Online Exam Module