PART –A (Ans all the question)

1. What is mean by ideal sources?

2. Five resistances are connected as shown in figure below. The equivalent resistance

Between the points A and B will be

3. Define magnetic ohm’s law.

4. Define magnetic flux density.

5. What is mean by reluctance?

PART-B Ans any four

6. State and explain Kirchoff’s law.

7. What is leakage flux and fringing effect?

8.By using current division rule, find the branch current.

3 Ω 25 Ω 10 Ω

100 2 Ω

9.A mild steel ring has a radius of 50 mm and a cross sectional area of 400 mm2. A current of 0.5 A flows in a coil wound uniformly around the ring and the flux produced is 0.1 mWb. If the relative permeability at this value of current is 200 find (i) the reluctance of the mild steel and (ii) the number of turns on the coil.

10. Explain the V-I relation between different passive elements(R L C) in the circuits.

PART-C Ans any three

11).Using the node voltage analysis for the given circuit, find all the node voltages and currents in resistances.

3 Ω

250 V 1 Ω 2Ω

6 Ω

5 A 5Ω

12)Using mesh analysis finds the mesh currents.

22 Ω 33 Ω

100 V 42 Ω 120 V

24 Ω 68 Ω

17 Ω 25 Ω

200 V

13) (i) Drive the analysis for simple magnetic circuit with suitable diagram.(6)

(ii) Compare Electric circuit with Magnetic circuit.(6)