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BARC Quiz 5

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Question 1

Consider the circuit shown in figure (a), the signal applied as input to the circuit is V_in [shown in figure (b)]

The voltage across diode V_D is given as (Assuming diode to be ideal)

Question 2

A 12-bit ADC is operating with a 1

clock period and total conversion time is seen to be 14

always. The ADC must be of the type

Question 3

In the given circuit, the values of

and

respectively are

Question 4

For a double hetero junction LED emitting light at a peak wavelength of 1.3 μm has radiative and non-radiative recombination time as 40 nsec and 120 nsec respectively, then the bulk recombination lifetime will be

Question 5

Which of the following type of noise gains importance at low frequency?

Question 6

In SSB modulation system, if signal (cos 30t) is modulated with a carrier signal of frequency 850 rad /sec, then the expression for the lower side band is

Question 7

In a JK flip-flop we have J = Q’ and K = 1. Assuming that the flip-flop was initially cleared and clocked for 6 pulses, the sequence at the Q output will be

Question 8

A transmission line has a characteristic impedance of 50 Ω and a resistance of 0.1 Ω /m. if the line is distortion less, the attenuation constant (in Np/m) is

Question 9

A uniform plane wave in air impinges at 45⁰ angles on a lossless dielectric material with dielectric constant E_r.The transmitted wave propagates in a 30⁰ direction with respect to the normal. The value of E_r is

Question 10

The temperature below which certain materials are antiferromagnetic and above which they are paramagnetic is called

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ESE & GATE EC General

Mar 28ESE & GATE EC