ASSIGNMENT

CHAPTET-1 Assignment

1. How Alternating Emf Is Induced?

2. Mathematical Operations Of Vectors.

3. Write Following Terms.

(I) Cycle (Ii) Time Period (Iii) Frequency (Iv) Instantaneous Value (V) Rms Value (Vi) Average Value (Vii) From Factor

(Viii)Phase Difference (Xi) Maximum Value

4. Derive R.M.S Value Of Irms=

CHAPTET-2 Assignment

1. A.C through Pure Resistance. Or Explain Pure Resistive Circuit Derive P=VI

2. Explain A.C Through Pure Inductor.

3. Explain A.C Pure Capacitor.

4. Explain R-L Series.

5. Explain R-L-C Series.

6. Explain Frequency Resonance In R-L-C Series.

CHAPTET-3 Assignment

1. Explain Vector Or Phasor Method In A.C Parallel Circuit.

2. Explain Admittance Method In A.C Parallel Circuit.

3. Explain Complex Algebra Method In A.C Parallel Circuit.

4. Explain Graphical Representation Of Parallel Resosnance.

5. Explain Q Factor Of Parallelcircuit .(Short Question)

6. Comparision ON Series And Parallel Resosance.

CH: 4 POLYPHASE CIRCUITS

1. State the advantages of three phase system over single phase system.

2. Obtain the equation of voltage, current and power in star connection.

3. Obtain the equation of voltage, current and power in delta connection.

4. What is meant by six phase supply? How three phase supply is obtained from six phase supply?

5. Each phase of a delta connected load has a resistor of 50Ω connected in series with a capacitor 0f 100µF. Calculate (1) line voltage (2) phase voltage (3) phase current

(4) Line current (5) power factor (6) actual power (7) reactive power (8) apparent power.

6. A load connected in star across 400 v, three phase supply takes a line current of 8 A and draws power of 5 KW. Find (1) phase voltage (2) phase current (3) impedance (4) load power factor.

CH: 5 POWERS IN A.C.CIRCUITS

1. Explain the active and reactive components of current.

2. Explain apparent power, active power and reactive power.

3. Explain different definitions of power factor.

4. Explain unity, lagging and lead and power factor with the help of waveforms and vector diagrams.

5. Explain the reason of low power factor.

6. State the disadvantages of low power factor.

7. In a three phase load, the resistance and reactance per phase are respectively 30Ω and 40Ω. These are connected in series. If the supply voltage is 400 V, 50 HZ, calculate (1) apparent power (2) active power (3) reactive power (4) power factor, when the load is connected in (a) star (b) delta.