UNIT-1
(A) Theory
1. State and explain Ohms law.
2. State and explain Kirchhoff’s laws.
3. Write a short notes on basic circuit components.(About Resistor,inductor,Capacitor)
4. Discuss the different Factors on which the resistance is dependent?
5. Derive the expressions for energy stored in inductor and capacitor
6. Explain the effect of temperature on resistance.
7. Write any differences between, insulator, conductor, and semiconductor.
(B) Problems.
Solve the problems from the hard copy given and assignment
UNIT-2
(A)Theory
Solve the problems from the hard copy given and assignment.
UNIT-3(Alternating quantities)
(A) Theory
1. Define the following terms
(i)Alternating quantity (ii) waveform (iii) cycle (iv) Maximum value (v) time period (vi) frequency
(Vii) Form factor (viii) peak factor
2. Derive the expression for root mean square value of an alternating sinusoidal current wave form I = Im Sin θ.
3. Derive the expression for average value of an alternating sinusoidal current wave form
I = Im Sin θ.
4. Derive the expression for root mean square value of an alternating sinusoidal voltage wave form V = Vm Sin θ.
5. Derive the expression for Average value of an alternating sinusoidal voltage wave form V = Vm Sin θ.
6. Explain AC through Pure resistor
7. Explain AC through RL series circuit
8. Explain AC through RLC series circuit with phasor diagrams
(A) Theory
1. State and explain Ohms law.
2. State and explain Kirchhoff’s laws.
3. Write a short notes on basic circuit components.(About Resistor,inductor,Capacitor)
4. Discuss the different Factors on which the resistance is dependent?
5. Derive the expressions for energy stored in inductor and capacitor
6. Explain the effect of temperature on resistance.
7. Write any differences between, insulator, conductor, and semiconductor.
8. Three lamps are connected in parallel to a 200V supply. Two of the lamp currents are I1=2A and I2=3A. If the total supply current is 9A, calculate the resistance of each of the three lamps shown in figure 1.
(B) Problems.
Solve the problems from the hard copy given and assignment
UNIT-2
(A)Theory
- Explain different types of elements in detail.
- Three resistances are connected in star, determine its equivalent delta configuration.
- Explain dependent energy sources.
- State and explain superposition theorem.
- Derive the relation for conversion from delta to star connection.
- State and explain maximum power transfer theorem.
- state and explain Thevenin’s theorem
- Inductances are connected in series and parallel determine equivalent inductance and capacitance
Solve the problems from the hard copy given and assignment.
UNIT-3(Alternating quantities)
(A) Theory
1. Define the following terms
(i)Alternating quantity (ii) waveform (iii) cycle (iv) Maximum value (v) time period (vi) frequency
(Vii) Form factor (viii) peak factor
2. Derive the expression for root mean square value of an alternating sinusoidal current wave form I = Im Sin θ.
3. Derive the expression for average value of an alternating sinusoidal current wave form
I = Im Sin θ.
4. Derive the expression for root mean square value of an alternating sinusoidal voltage wave form V = Vm Sin θ.
5. Derive the expression for Average value of an alternating sinusoidal voltage wave form V = Vm Sin θ.
6. Explain AC through Pure resistor
7. Explain AC through RL series circuit
8. Explain AC through RLC series circuit with phasor diagrams
- Problems.
UNIT-4(Transformers)
- Explain the principle of operation of a Transformer
2 Explain the constructional details of transformer.
3. Explain ideal transformer and practical transformer on no load with phasor diagrams and List the losses occur in transformer.
4. Derive the induced emf equation of transformer.
5. Derive the maximum efficiency condition of a single phase transformer and Load KVA corresponding to Maximum efficiency
6. with neat circuit diagrams, explain the procedure for conducting OC and SC Tests on a given 1-ø transformer
7. Explain practical transformer on Load with phasor diagrams
8. Explain what happens if Dc supply is give transformer and why transformer is rated in KVA.
(B) Problems.
Solve the problems from the hard copy given and assignment.