EC > GATE 2017 SET-2 > Frequency Modulation
A modulating signal given by x(t)=5sin(4π103t-10πcos2π103t) V is fed to a phase modulator with phase deviation constant kp=5 rad/V. If the carrier frequency is 20 kHz, the instantaneous frequency (in kHz) at t=0.5 ms is
Correct : 70
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