69501. The most common content of hernia-en glissade
69502. A 1000 kHz carrier is simultaneously modulated by 300 Hz and 2 kHz audio sine wave. Which of the following frequencies will not be present in the output?
69503. SWR for a transmission line is infinity when the load is Short circuitComplex impedanceOpen circuitPure reactance Of the above statements:
69504. The discone antenna is
69505. The direction of pick up in a CD is
69506. A (75 - j 50) Ω load is connected to a coaxial line of Z0 = 75 Ω at 10 GHz. The best method of matching consists of using
69507. In PCM the amplitude levels are transmitted in a 7 unit code. Sampling frequency is 10 kHz. The bandwidth should be
69508. In colour television V and U signals are
69509. Which of the following has highest power gain?
69510. Two messages m1, and m2 have a probability of 0.5 each. The entropy is
69511. A TV receiver is 40 cm wide and 30 cm high. The EHT supply required is about
69512. An AM signal is detected using an envelope detector, the carrier frequency and modulating signal frequency are 1 MHz and 2 kHz respectively. An appropriate value for the time constant of the envelope detector is
69513. For signal amplitude modulated to a depth of 100% by a sinusoidal signal, power is
69514. If transmitted power is 10 kW, the field strength at a distance d is 50 mV/m. If transmitted power is reduced to 2.5 kW, the field strength at the same point will be
69515. Some features of advanced mobile phone service are To provide telephone communication to a large number of telephone users within the area of a metropolitan onlyTo use minimum amount of frequency spectrumTo permit hand held as well as vehicle operation of telephone Which of the above are true?
69516. The carrier frequency will be if L = 50 µH and C = 1 nF.
69517. Three point tracking is achieved with
69518. In TV transmitter, visual exciter may consist of Video processing unitVisual modulatorVSB filterDelay equaliserFrequency converter Which of the above are actually a part of visual exciter?
69519. The positive peak of an AM wave is 16 V and the minimum value is 4 V Assuming single tone modulation, the modulation index is
69520. In a circuit the value of resistor is made four times. The noise voltage generated by this resistance will
69521. A resistor of 10 kΩ has an rms noise voltage of 1 mV under a certain set of conditions. A resistor of 20 kΩ under the same conditions will have an rms noise voltage of
69522. In a satellite system circular polarization is to be obtained. The antenna used is
69523. A horizontal output stage is cutoff for retrace and 40% of trace. If time for each horizontal line is 64 μs and retrace time is 12 μs, the transistor is conducting for about
69524. A TV remote control works on the principle of
69525. As the magnitude of reverse bias is increased, the capacitance of varactor diode
69526. To prevent overloading in the last IF amplifier one should use
69527. Immediate intravenous solution of choice to treat a case of hypovolaemic shock is
69528. The tape recorders used in homes have
69529. In a communication system, noise is most likely to affect the signal
69530. Each frequency in the modulating wave gives rise to four side bands.
69531. Assertion (A): CCIR-B system has 625 scanning lines per frame and 2 : 1 interlace.Reason (R): The aspect ratio is 4 : 3
69532. In VHS format each video head is tilted from azimuth by
69533. The number of possible colours with a 4 line digital input monitor are
69534. Convolution of x(t + 5) with impulse function δ(t - 7) is equal to
69535. Which of the following is a better recording medium?
69536. An angle modulated signal is given by s(t) = cos 2p (2 x 106t + 30 sin 150t + 40 cos 150t). The maximum frequency and phase deviations of s(t) are
69537. The PSD and the power of a signal g(t) are respectively Sg(ω) and Pg, the PSD and the power of signal a.g(t) are respectively
69538. Most common site of adamantinoma is
69539. The simplest method of suppression of unwanted side band in AM is
69540. For attenuation of low frequencies we should use
69541. Assertion (A): A colour TV uses a SAW filter to give stable band pass response and high gain.Reason (R): Devices using SAW principle are used in many systems.
69542. At night the ionosphere can be considered to be consisting of
69543. A balun transformer gives an impedance transformation of
69544. Which one of the following is true?
69545. A 1000 kHz carrier wave modulated 40% at 40000 Hz is applied to a resonant circuit tuned to a carrier frequency and having Q = 140. What is the degree of modulator after transmission through the circuit?
69546. The EHT voltage in a picture tube of TV is
69547. In cellular telephone each cell is designed to handle
69548. A UPS contains
69549. A transmitter power of 10 W is increased by 30 dB. The effective radiated power is
69550. It is desired to couple a coaxial line to a two parallel wire line. It is best to use
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