ECE :: Exam Questions Paper
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The antenna current of an AM transmitter is 8 A, when only the carrier is sent, but it increases to 8.93 A when the carrier is modulated by a single sine wave. Determine the antenna current when the percent of modulation changes to 0.8
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A noiseless 3 KHz channel can transmit binary at the rate __________ .
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Find Vx Vy Vz
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Consider a stable and causal system with impulse response h(t) and system function H(S). Suppose H(S) is rational, contains a pole at S = - 2, and does not have a zero at the origin. The location of all other poles and zero is unknown for each of the following statements. Let us determine whether statement is true or false.
- f[h(t) e-3t] converges
- h(t) has finite duration
- H(s) = H(- s)
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The specific gravity of tungsten is 13.8 and its atomic weight is 184.0 Assume that there are two free elements per atom. Then the Fermi level or characteristic energy for the crystal in eV will be
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An air-filled rectangular waveguide has dimensions 8cm x 10cm . The phase velocity of guided wave at frequency of 3 GHz for TE10 mode is
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For a given voltage, four heating coils will produce maximum heat when connected
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Denominator polynomial of a transfer function of certain network is:
s3 + s2 + 2s + 24
Then the network is: -
A TV picture is to be transmitted over a channel of 6 MHz bandwidth at a 35 dB S/N ratio. The capacity of the channel is
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then the sequence x[n] is
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