Electrical Circuit Analysis

Thevenin's and Norton's equivalents are:

1. Different representations with different values
2. Identical in all circuits
3. Equivalent with same behavior at load terminals
4. Applicable only for AC circuits

Mesh analysis is preferred when:

1. The number of meshes is more than nodes
2. The number of meshes is less than nodes
3. Dependent sources are present
4. Circuits are complex

The steady-state response in a circuit is observed:

1. During initial t = 0
2. When t→∞
3. When energy is maximum
4. Just after switching

In a critically damped RLC circuit, the roots of characteristic equation are:

1. Complex conjugates
2. Real and distinct
3. Real and equal
4. Purely imaginary

The admittance of an inductor is:

1. jωL
2. 1/(jωL)
3. −jωL
4. jωC

The average power in a purely capacitive circuit is:

1. Zero
2. Maximum
3. Depends on frequency
4. Infinite

Poles are values of 's' where:

1. Input is zero
2. Output is zero
3. Denominator of transfer function is zero
4. Numerator is zero

Convolution in time domain becomes……… in Laplace domain:

1. Division
2. Addition
3. Multiplication
4. Integration

A network is reciprocal if it contains only:

1. Resistors
2. Resistors and capacitors
3. Passive linear elements
4. Active devices

The h-parameters are mainly used for:

1. Filter design
2. Inductor modeling
3. Transistor modeling
4. Transformer design

State Maximum Power Transfer Theorem. Prove that efficiency of the circuit under maximum power transfer condition is 50%.

Find the voltage across 3Ω resistor using any theorem for the circuit shown in Figure-1

Find V_A using the principle of superposition in network as shown in Figure 2.

State Reciprocity Theorem. Verify the Reciprocity Theorem for the circuit shown in Figure 3.

Explain the behaviour of RL and RC elements for transient condition. Mention their representation at the time of switching.

Draw the circuit of parallel RLC circuit and derive the formulae for resonant frequency, half-power frequencies, bandwidth and quality factor.

Determine Laplace transform of a following (i) sin2t (ii) cos2t

Synthesis the waveform shown in Figure 4 below and Determine Laplace transform of periodic waveform.

To find Thevenin equivalent between terminals 'a' and 'b' as shown in Figure 5.

A switch is moved from position 1 to 2 at t=0 as shown in Figure 6. Find V_R(t) and V_C(t) for t>0.

Explain about the transmission parameters and derive the condition for symmetry and reciprocity.

Determine z-parameter of network shown below in Figure 7 & give its equivalent circuit.

Define two-port network and write assumptions to be made to find network and also obtain Y parameter.

Two coils connected in series have an equivalent inductance of 10H. When the connections of one coil are reversed, the effective inductance is 6H. If the co-efficient of coupling is 0.6, calculate the self-inductance of each coil and mutual inductance.

Poles and Zeros

Convolution integral

Mutual coupled circuits

Transmission and Hybrid parameters