In amplitude modulation,the amplitude of the carrier wave is $A_c$ and that of the modulating signal is $A_m$. In practice,the ratio of $A_m$ to $A_c$ is kept less than or equal to $1$ to avoid:

Television signals on earth cannot be received at distances greater than $100\, km$ from the transmission station. The reason behind this is that

$A$ diode detector is used to detect an amplitude modulated wave with $60\%$ modulation,using a capacitor of $250 \ pF$ in parallel with a resistor of $100 \ k\Omega$. What is the maximum modulation frequency that can be detected by this circuit?

Which of the following elements is doped to a fiber amplifier in an optical fiber communication system?

In the given detector circuit,the suitable value of carrier frequency is

In amplitude modulation,the modulation index $m$ is kept less than or equal to $1$ because