Communication Systems When the length of antenna is a whole wavelength The radiation at right angles is zero The radiation is zero in all directions The radiation is maximum in all directions The radiation at right angles is maximum The radiation at right angles is zero The radiation is zero in all directions The radiation is maximum in all directions The radiation at right angles is maximum ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In case of low level amplitude modulation system, the amplifiers following the modulated stage must be Linear devices Non-linear devices Class C amplifiers Harmonic devices Linear devices Non-linear devices Class C amplifiers Harmonic devices ANSWER DOWNLOAD EXAMIANS APP
Communication Systems As per Shannon-Hartley theorem, a noise less Gaussian channel has Infinite capacity Zero capacity Small capacity None of these Infinite capacity Zero capacity Small capacity None of these ANSWER DOWNLOAD EXAMIANS APP
Communication Systems A buffer amplifier is A double-tuned amplifier None of these A high gain D.C. amplifier A cathode follower stage A double-tuned amplifier None of these A high gain D.C. amplifier A cathode follower stage ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Assertion (A): In FM the frequency of the carrier is varied by the modulating voltageReason (R): FM and PM are two forms of angle modulation. A is correct but R is wrong A is wrong but R is correct Both A and R are correct and R is correct explanation of A Both A and R are correct but R is not correct explanation of A A is correct but R is wrong A is wrong but R is correct Both A and R are correct and R is correct explanation of A Both A and R are correct but R is not correct explanation of A ANSWER DOWNLOAD EXAMIANS APP
Communication Systems The modulation index of an FM is changed from 0 to 1. How does the transmitted power change? Gets halved Gets increased by 50 percent Gets doubled Remains unchanged Gets halved Gets increased by 50 percent Gets doubled Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS