Q. Household tape recorders use

View solution

Q. A 400 W carrier is modulated to a depth of 75 percent. The total power in modulated wave will be

View solution

Q. A geostationary satellite

View solution

Q. For an ideal 3000 Hz channel, Nyquist rate is

View solution

Q. Assertion (A): Electromagnetic waves in free space spread uniformly in all directions from a point source

Reason (R): Free space has no interference or obstacles.

View solution

Q. In the FM wave described by equation v = 15 sin (4 x 10⁸ t + 3 sin 1100 t), the maximum frequency deviation is

View solution

Q. The radar cross-section of a target depends an

View solution

Q. The Nyquist sampling interval, for the signal sin c (700t) + sin c (5000 t) is

View solution

Q. A line has L = 0.8 µH/m and C = 32 pF/m. Z0 =

View solution

Q. A line has standing waves with a voltage maximum of 35 mV and minimum of 17.5 mV VSWR is

View solution

Q. For a bit rate of 8 kbps, the best possible values of the transmitted frequencies in a coherent binary FSK system are

View solution

Q. If luminance signal Y = 0.3 R + 0.59 G + 0.11 B, the hue of R - Y colour is

View solution

Q. Trap circuits used in video IF amplifier of colour TV are

View solution

Q. 24 telephone channels, each band limited to 3.4 kHz are to be time division multiplexed using PCM. If sampling frequency is 10 kHz and number of quantization levels is 128, the required bandwidth of PCM is

View solution

Q. Resonant circuits are used in

View solution

Q. Linear diode detector utilizes

View solution

Q. In the equivalent circuit of a moving coil cone type loudspeaker, the mass of the moving system is represented by

View solution

Q. FSK is a system involving

View solution

Q. A 200 Hz sound wave is to be transmitted by a 1000 kHz radio wave using frequency modulation. The instantaneous frequency variation will be

View solution

Q. In a TV studios, flying spot scanner is a device for

View solution