The modulation index of FM is given by*2 pointsfrequency deviation/ modulating frequencymodulating frequency /frequency deviationmodulating frequency/ carrier frequencycarrier frequency / modulating frequency

In FM, frequency deviation is directly  proportional toSelect one:a. modulating frequencyb. carrier frequencyc. carrier amplituded. modulating signal amplitude

The amount of frequency deviation in FM signal depends on*2 pointsAmplitude of the modulating signalCarrier frequencyModulating frequencyTransmitter amplifier

Modulation index of wideband FM systemA. >1B. < 1C. = 1D. NoneSelect one:a. Db. Bc. Ad. C

The increase or decrease in the frequency around the carrier frequency is termed as*2 pointsFigure factorFrequency deviationModulation indexFrequency spectrum

A carrier wave of frequency 100 MHz is frequency-modulated by a sinusoidal wave ofamplitude 20 V and frequency 100 kHz. The frequency sensitivity of the modulator is 25kHz/V.(a) Determine the approximate bandwidth of the FM wave, using Carson’s rule.(b) Determine the bandwidth obtained by transmitting only those side-frequencieswith amplitudes that exceed one percent of the unmodulated carrier amplitude.