Assignment.docx

ASSIGNMENT-II Sub: Network theory Unit –III Short answer questions: 1. What is the significance of Time constant of RL Circuit, What are the different ways of defining time constant? 2. What are the initial conditions? Why do we need them. 3. Derive the expression for Response in a series R-L circuit with step input using Laplace transform. 4. Derive the expression for Response in a series R-C circuit with step input using Laplace transform. 5. Derive the expression for Response in a series R-L –C circuit with unit step input using Laplace transform. Long Answer questions: 1. Derive the expression of current Response in RL series circuit when DC voltage applied at t=0 by closing the switch.Draw the response curve for i(t) Vs time .Define time constant of RL circuit. 2. Derive the expression of current Response in RC series circuit when DC voltage applied at t=0 by closing the switch.Draw the response curve for i(t) Vs time .Define time constant of RL circuit. 3. Derive the expression of current Response in RLC series circuit when DC voltage applied at t=0 by closing the switch.Draw the response curve for i(t) Vs time .Define time constant of RL circuit. 4. Derive the expression of current Response in RL series circuit when DC voltage applied at t=0 by closing the switch.Draw the response curve for i(t) Vs time .Define time constant of RL circuit. 5. Derive the expression of current Response in RL series circuit when AC sinusoidal voltage applied at t=0 by closing the switch. 6. Derive the expression of current Response in RC series circuit when AC sinusoidal voltage applied at t=0 by closing the switch. 7. Derive the expression of current Response in RLC series circuit when AC sinusoidal voltage applied at t=0 by closing the switch. 8. Derive the expression for i(t) in R-L series Circuit and Parallel circuit for step input and Impulse input, pulse input. 9. Derive the expression for i(t) in R-C series Circuit and Parallel circuit for step input and Impulse input, pulse input. 10. Derive the expression for i(t) in R-L-C series Circuit and Parallel circuit for step input.

Unit-IV: Short answer questions: 1. Derive the expression for Resultant Impedance ,if two two-port networks are connected in series? 2. Derive the expression for Resultant Admittance ,if two two-port networks are connected in parallel ? 3. Give the expression for Resultant ABCD parameters if two two-port networks are connected in Cascaded. 4. Find the z-parameters for the T-network having Impedance of Z1=(6+j3)Ω ,Z2=(3+j5)Ω, Z3=(5+j3)Ω, and Vefify the condition for symmetry and Reciprocity. 5. Calculate the Z-parameters for the symmetrical Lattice Network?