Q. Counterpoise is used in coils having

View solution

Q. In standing wave pattern on a transmission line

View solution

Q. If the bandwidth is increased by 2, the γFM γAM (where γ is the ratio of SNR of output to SNR at input, FM is frequency modulation and AM is amplitude modulation) is increased by a factor of

View solution

Q. A carrier wave carries information.

View solution

Q. Frequency shift keying is used mostly in

View solution

Q. A generator is feeding power to a transmission line of characteristic impedance Z0. The line is terminated in impedance ZL. Standing waves will be set up if

View solution

Q. In sound recording the degree of pre-emphasis is about 6 dB/ octave.

View solution

Q. Space wave may be a direct wave or wave reflected from earth.

View solution

Q. Radio broadcasts are generally

View solution

Q. If the frequency of a wave 20 Hz, the time period is

View solution

Q. In radar systems PRF stands for

View solution

Q. Which of the following cannot be the Fourier series expansion of a periodic signal?

View solution

Q. Which of the following is the indirect way of FM generation?

View solution

Q. A telephone exchange has 9000 subscribers. If the number of calls originating at peak time is 10, 000 in one hour, the calling rate is

View solution

Q. A cordless telephone using separate frequencies for transmission in base and portable units is known as

View solution

Q. For attenuation of high frequencies we should use

View solution

Q. A modem is classified as low speed if data rate handled is

View solution

Q. VSB modulation is preferred in TV because

View solution

Q. A woofer should be fed from the input through a

View solution

Q. It is desired that transmission line and load should match for a range of frequencies. The best method is

View solution