In general,a transmitting antenna is........

Which type of propagation is used to transmit radio waves from one place to another?

If a signal of frequency $3 \ kHz$ is to be transmitted via amplitude modulation,which of the following should be chosen as the carrier wave frequency?

The total maximum transmitted power in amplitude modulation if the carrier output power is $1 \ kW$ is

Which one of the following is not classified as pulse modulation?

If a message signal of frequency $f_{m}$ is amplitude modulated with a carrier signal of frequency $f_{c}$ and radiated through an antenna,the wavelength of the corresponding signal in air is ....... .