ESE EE Electric Circuits (Networks) : National Champion Test for ESE & GATE EE Exams

Question 1

A network function

has a single pole at

and a single zero

If the excitation

then what is the angle of lead or lag of the current?

Question 2

For the below given circuit, if supply frequency,

rad/sec and

volts, then what is the lead angle of

with

?

Question 3

What is the value of I for the below shown circuit, if V = 2 volts?

Question 4

For the circuit shown, find out the current flowing through the 2Ω resistance. Also identify the changes to be made to double the current through the 2Ω resistance.

Question 5

A triangular pyramid, built up of six wires whose resistances are shown in the figure, is fed from a 1 V battery at the terminals
A and B. The current through the branch DB is

Question 6

In the following circuit, the value of the base current I_B will be

Question 7

Consider an L-R circuit in which a current is following. The voltage across the R-L circuit is given by

Question 8

A single-phase ac voltage source has 200 V rms and a system connected consumes an active power of 300 W. What is the reactive power consumed by the system if 2.5 A rms current is drawn?

Question 9

In a two element series network, the voltage and current respectively are given as,

then the power factor of the network is approximately

Question 10

A lossy capacitor is represented by an ideal capacitor C with a high resistance R in parallel. What is the Q of the circuit at frequency ω?

Question 11

A voltage of V =100∠30^o is applied to an impedance Z=3+j4.Which one of the following is the power triangle?

Question 12

Consider the following driving point immittance functions:
1)

2)

3)

4)

Which of these are LC immittance functions?

Question 13

The network realization of RC impedance function,

is as shown below. What are the values of α and β?

Question 14

For the following driving point impedance functions, which of the following statements is true?

Question 15

The incidence matrix A of a connected graph is given below:

The following statements are associated with the above matrix:
1) Branches 2, 3 are in series.
2) Branches 4, 5 are in series.
3) Voltages of branches 4, 5 and 6 form an independent set.
Which of the statements given above is/are correct?

Question 16

If

for the circuit shown below, then what is the value of R₁?

Question 17

The pole zero diagram of an impedance Z(s) is shown in the below figure.

pole,

zero

Poles

are at

and

and zero (O) is at

For a signal

the steady state response across

is

What is the value of θ?

Question 18

Thevenin’s equivalent circuit comprises of:

Question 19

What will be Thevenin equivalent resistance across the circuit?

Question 20

If a series RLC circuit resonates at 1.5 kHz and consumes 100 watts from a 100 volts AC source operating at resonant frequency with a bandwidth of 0.75 kHz; the values of R, L and Q-factor of the circuit are respectively

Question 21

Assertion (A): A network is said to be in resonance when the voltage and current at the network input terminals are in phase.
Reason (R): In a two-terminal network containing at least one inductor and one capacitor, the resonance is defined as the
condition which exists when the input impedance of the network is purely resistive.

Question 22

A 2-terminal network consists of one of the RLC elements. The element is connected to an a c supply. The current through the element is IA. When an inductor is inserted in series between the source and the element the current through the element becomes 2 I

Question 23

Consider the following statements regarding the properties of an R-L-C series circuit under resonance
1. Current in the circuit is in phase with applied voltage
2. Voltage drop across capacitor C and inductance L are equal in magnitude
3. Voltage across the capacitor is equal in magnitude to the applied voltage
4. Current in the circuit is maximum
Which of the above statements is/are correct?

Question 24

In the circuit given below, the switch is open for a long time. At time

, the switch is closed. What are the initial and final values of voltages across the inductor?

Question 25

The circuit given below is in steady state for a long time with switch S open. The switch is closed at

The current through R at

will be

Question 26

In the below shown circuit, under what conditions the output

will be proportional to

(with T = time period of input)

Question 27

Consider the two port transistor circuit as given below:
Match List-I (Hybrid Parameter) with List-II (Circuit Element) and select the correct answer using the code given below the lists: