Q1:

Determine the supply current I in the circuit shown in fig.

Q2:

In an a.c. series RLC circuit, the voltage across R and L is 20 V, voltage across L and C is 9 V and voltage across RLC is 15 V. what is the voltage across C?

Q3:

For a parallel RLC resonant circuit, the damped frequency is $\sqrt{8}$r/s and bandwidth is 2 r/s. what is its resonant frequency?

Q4:

Assertion (A) : Norton’s theorem is applied to a network for which no equivalent

Thevenin’s network exists.

Reason (R) : Norton’s Theorem enables one to calculate quickly current and voltage in a particular branch of interest in a complicated network.

Q5:

In the circuit shown below, for different values of R, the values of V and I are given, other elements remaining the same

When $R=\infty$,  V = 5 V

When $R=0$,  ${\rm I}=2.5A$

When $R=3\Omega$, the value of V is given by

Q6:

The linear network as shown below has only resistors. If ${{\rm I}}_1=8A$and ${{\rm I}}_2=12A$; V is found to be 80 V. When ${{\rm I}}_1=-8A$and ${{\rm I}}_2=4\mathrm{A,\; V\; is\; found\; to\; be\; 0}$. Then the value of V when ${{\rm I}}_1={{\rm I}}_2=10A$, is

Q7:

The voltage-current relationship feeding the network N is shown in the below figure. The Thevenin’s equivalent of network N will have V_TH and R_TH as

Q8:

Replace the below shown circuit by a single voltage source in series with an impedance.

Q9:

Consider the following circuit:

What should be the value of resistance R, in the above circuit if it has to absorb the maximum power from the source?

Q10:

The black box as shown in the circuit below contains resistors and independent sources. For R = 0 and 2, the value of current I is 3 and 1.5 respectively. The value of I for R = 1 will be

Q11:

For the circuit shown in the given figure, when the voltage E is 10 V, the current I is 1 A. If the applied voltage across terminal C-D is 100 V, the short circuit current flowing through the terminal A-B will be

Q12:

Consider the following statements:

1. Network theorem are not derivable from Kirchhoff’s law.

2. To get the Norton current, one has to short the current source.

3. Thevenin’s theorem is suitable for a circuit involving voltage sources and series connections

Q13:

According to maximum power transfer theorem, when is the maximum power absorbed by one network from another network?

Q14:

Consider the following statement:

The transfer impedance of a 2-port network remain constant when the position of excitation and response are interchanged if the network

1. is linear

2. Consists of bilateral elements

3. has high impedance

4. is resonant

Which of these statements is/are correct?

Q15:

Superposition theorem is not applicable for