ECE :: Exam Questions Paper
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Which one of the following statements is correct?
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The time domain behaviour of an RL circuit is represented L
+ Ri = V0 (1 + Be-Rt/L sint)u(t)
For an initial current of i(0) =
, the steady state value of the current is given by -
Which of the following is true?
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A standard waveguide W R90 has inside wall dimensions of a = 2.286 cm and b = 1.016 cm. What is the cut-off wavelength for TE01 mode?
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Which of the following statements is not correct for thermistors?
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Which one of the following logic families can be operated using a supply voltage from 3 V to 15 V?
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The circuit shown in the figure is used to charge the capacitor C alternately from two current sources as indicated. The switches S1 and S2 are mechanically coupled and connected as follow
For 2nT ≤ t < (2n + 1)T, (n = 0, 1, 2, ...) S1 to P1 and S2 to P2
For (2n + 1) T ≤ t < (2n + 2)T, (n = 0, 1, 2, ...) S1 to Q1 and S2 to Q2
Assume that the capacitor has zero initial charge. Given that u(t) is a unit step function, the voltage Vc(t) across the capacitor is given be
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A.
AGC in radio receivers will keep the total signal output fairly constant but the noise component will be reduced; with the result the
 ratio will improve. |
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B.
AGC in radio receivers is a linear operation w.r.t. both signals and noise
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C.
Sudden changes in the output while tuning, which may cause damage to the components, is an unavoidable feature of AGC
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D.
AGC operation is independent of the filter components used in AGC circuit.
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(- 1)n tu(t - nT) 
