• Attempt any five questions.
• All questions carry equal marks.
Discuss about ideal voltage source and ideal current source with neat diagram. How ideal voltage source can be converted into ideal current source.
State and explain the superposition theorem with suitable example.
Using the mesh analysis, find the current through 5Ω resistor in the network as shown in figure below.
Define the following:
i) Average value of AC voltage,
ii) RMS value of AC voltage,
iii) Power factor,
iv) Active power,
v) Reactive power,
vi) Apparent power,
vii) Three phase balanced supply.
Draw Phasor diagram of a 3-phase delta connected load and find the relation between phase and line voltages and currents.
A 220 volt, 50 Hz supply is given to a series R, L, C circuit having a resistance of 50Ω, Inductance of 0.2H and capacitance of 100 µF. Calculate impedance, Current in the circuit and Voltage across R, L, C.
Discuss about magnetization characteristics of ferromagnetic material.
Draw the complete phasor diagram of a single phase transformer for an inductive load. Also write the notations used for all voltages and currents used in the phasor diagram.
What do you understand by self inductance and mutual inductance. Derive the relation between self inductance and mutual inductance.
Explain the construction and working principle of a DC machine with the help of neat diagram.
Discuss about the Torque - slip characteristics of 3-Phase Induction Motor.
A 6 pole alternator running at 1200 rpm supplies a three phase induction motor wounded for 4 poles. If the rotor induced emf makes 3 alternator per second. Find the actual rotor speed.
What do you understand by semiconductor. Explain the different types of semiconductors in details.
What is the need of full adder circuit? Design a Full adder circuit with truth table and logic diagram.
Write a short note on any two: a) Star Delta Transformation b) J-K Flip-Flop c) Laws of Electromagnetic Induction d) Power in balanced and Unbalanced Three Phase System
