ESE EC 2021 Technical Quiz 6

An intrinsic silicon sample is doped with boron. Find doping concentration in if Fermi level lies 0.416eV below the intrinsic Fermi level. Also assume that n_i 1.5 × 10¹⁰/cm³  and kT = 0.026 eV

A radar transmits pulse with a duration of 1.5 μs at a pulse repetition frequency (PRF) of 8 kHz. If the peak power of this radar is 500 kW, then the average power will be

When the damping force is more than the optimum, the instrument will become

A binary bipolar signal s(t) is a ‘+A’ volt or ‘–A’ volt pulse during the interval (0, T_b) in the binary system P(S₁) = P(S₂) = , A = 20 mV, = 2 x 10^–10 w/Hz and the transmission rate is 2 x 10⁵ bps. Assume approximation , the probability of error is

Consider the circuit shown below:

What do we call the material which gets strongly magnetised when placed in an external magnetic field?

Match List I (digital circuit) with list II (use) and select the correct answer using the codes given below

List I

A) Left shift register

B) right shift register

C) ROM

D) Demultiplexer

List II

1) Code conversion

2) Multiplication

3) Decoding

4) Division

A - B - C - D

Find the value of V₁ for the circuit shown below.

If G(s) is stable for 9 < k < 27 for first loop. Then for overall system to be stable range of k is?