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प्रश्न
Why is base band signal not transmitted directly? Give any two reasons
उत्तर
The baseband signal is not transmitted directly because
(i) Its higher wavelength (low frequency) will require the size of the antenna or aerial used for transmission to be very high.
(ii) For linear antenna (length l), the power radiated is proportional to `(1/lambda)^2` and hence, the effective power radiated by a long wavelength baseband signal would be small.
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संबंधित प्रश्न
The power radiated by linear antenna of length T is proportional to........................
(λ= wavelength)
- `lambda/ l`
- `[lambda/l]^2`
- `l/lambda`
- `[l/lambda]^2`
The process of regaining of information from carrier wave at the receiver is called .................
(a) modulation
(b) transmission
(c) propagation
(d) demodulation
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Show graphically an audio signal, a carrier wave and an amplitude modulated wave
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