ESE Prelims 2022 Achievers Quiz 5

A linear time invariant single input single output system has the state space model given by  where  and H = [1 0]. Here, x is the state vector, u is the input, and y is the output. The damping ratio of the system is

A 20 kVA transformer has an iron loss of 400 W and full load copper loss of 800 W. The maximum efficiency of the transformer will occur when the total loss is:

The symbol shown in figure represents:

Three capacitors each of 60 mF are connected in delta. The value of capacitance of each arm of the equivalent star connection is

Consider a system.

The system is characterized as:

Assuming the operational amplifier to be ideal, the gain V_out/V_in for the circuit shown in figure is

For the given ring oscillator the propagation delay of each inverter is 2msec. What is the fundamental frequency of the output?

A telephone signal band limited to 4 kHz is to be transmitted by PCM. If the signal to quantization noise is to be at least of 40 dB, the number of levels into which the signal is to be encoded will be

Consider a QAM scheme with M = 16, the minimum transmission bandwidth required for transmitting data at a rate of 12000 bps with zero ISI is______Hz.

Consider the following statements:

The temperature dependence of resistivity of a sample of N-type silicon is based upon carrier concentration and carrier mobility variations with temperature because

1) the resistivity of silicon increases, with temperature.

2) the mobility decreases with temperature

3) the carrier concentration increases with temperature

4) the resistivity of silicon decreases with temperature.

Which of these statements are correct?