10025 2 ॥॥॥ ॥।॥॥॥
PART-B
MODULE (1-4)
Answer any four questions, each question carries 10 marks :

11, Use nodal analysis to form network equations and solve the nodal voltages
using matrix method. Also calculate the current in different branches.
(10)

12. A steel ring of circular cross section of 1 cm in radius and having a mean

circumference of 94.3 cm has an air gap of 1 mm long. It is uniformly wound with
an exciting coil consisting of 600 turns and excited with a current of 2.5 A.
Neglecting magnetic leakage
Calculate :

i) m.m.f

ii) Magnetic flux

iii) Reluctance

iv) Flux density

v) Relative permeability of steel.
Assume that steel part takes about 40% of total ATs. (10)