Related InterviewSolutions

• What is communication system?
• For whom the ground waves are possible?(a) Low radio frequency at low range(b) High radio frequency at low range(c) Low radio frequency at high range(d) Low radio frequency at low range
• Name the part of the communication system which converts signal for propagation to send on communication channel to receiver.
• The height of a TV tower is h meter. If radius of the Earth is R, then during TV transmission, the area occupied is (if h < R):(a) πR2(b) πh2(c) 2πRh(d) πRh
• Which radiation has least wavelength?(a) X-ray(b) γ-ray(c) β-ray(d) α-ray
• In an amplitude modulated wave the maximum amplitude is 10 V and minimum amplitude is 2V. The modulation factor m is:(a) 2/3(b) 1/3(c) 3/4(d) 1/5
• Modulation factor of over modulated wave is(a) 1(b) zero(c) < 1(d) > 1
• What are the frequency limits for sky waves in sending signal to remote places?
• If \(\vec{E}\) and \(\vec{B}\) are electric and magnetic field vectors of electromagnetic waves, then the propagation of electromagnetic wave is along:(a) \(\vec{E}\)(b) \(\vec{B}\)(c) \(\vec{E} \times \vec{B}\)(d) \(\vec{E} . \vec{B}\)
• Explain modulation.