Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Questions  >  A coil is wound uniformly with 300 turns over... Start Learning for Free
A coil is wound uniformly with 300 turns over a steel ring of relative permeability 900, having a mean circumference of 40 mm and cross-sectional area of 50 mm2 . If a current of 25 amps is passed through the coil, find (i) m.m.f. (ii) reluctance of the ring and (iii) flux?
Most Upvoted Answer
A coil is wound uniformly with 300 turns over a steel ring of relative...
Answer:

Given:

Number of turns, N = 300

Current, I = 25 A

Relative permeability of steel ring, μr = 900

Mean circumference of steel ring, l = 40 mm

Cross-sectional area of steel ring, A = 50 mm2

(i) Calculation of m.m.f:

The m.m.f of a coil is given by the product of the number of turns and the current passing through it.

Hence, m.m.f = N x I = 300 x 25 = 7500 A-turns.

(ii) Calculation of reluctance:

The reluctance of the steel ring is given by the length of the magnetic path divided by the product of the permeability and the cross-sectional area of the ring.

Hence, reluctance = l / (μr x A) = 40 x 10^-3 / (900 x 4.97 x 10^-5) = 0.0918 Amperes/Tesla.

(iii) Calculation of flux:

The flux produced in the steel ring is given by the ratio of the m.m.f to the reluctance.

Hence, flux = m.m.f / reluctance = 7500 / 0.0918 = 81693.9896 Weber.

Therefore, the m.m.f is 7500 A-turns, the reluctance of the ring is 0.0918 Amperes/Tesla, and the flux produced in the ring is 81693.9896 Weber.
Explore Courses for Electrical Engineering (EE) exam

Top Courses for Electrical Engineering (EE)

A coil is wound uniformly with 300 turns over a steel ring of relative permeability 900, having a mean circumference of 40 mm and cross-sectional area of 50 mm2 . If a current of 25 amps is passed through the coil, find (i) m.m.f. (ii) reluctance of the ring and (iii) flux?
Question Description
A coil is wound uniformly with 300 turns over a steel ring of relative permeability 900, having a mean circumference of 40 mm and cross-sectional area of 50 mm2 . If a current of 25 amps is passed through the coil, find (i) m.m.f. (ii) reluctance of the ring and (iii) flux? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A coil is wound uniformly with 300 turns over a steel ring of relative permeability 900, having a mean circumference of 40 mm and cross-sectional area of 50 mm2 . If a current of 25 amps is passed through the coil, find (i) m.m.f. (ii) reluctance of the ring and (iii) flux? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A coil is wound uniformly with 300 turns over a steel ring of relative permeability 900, having a mean circumference of 40 mm and cross-sectional area of 50 mm2 . If a current of 25 amps is passed through the coil, find (i) m.m.f. (ii) reluctance of the ring and (iii) flux?.
Solutions for A coil is wound uniformly with 300 turns over a steel ring of relative permeability 900, having a mean circumference of 40 mm and cross-sectional area of 50 mm2 . If a current of 25 amps is passed through the coil, find (i) m.m.f. (ii) reluctance of the ring and (iii) flux? in English & in Hindi are available as part of our courses for Electrical Engineering (EE). Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of A coil is wound uniformly with 300 turns over a steel ring of relative permeability 900, having a mean circumference of 40 mm and cross-sectional area of 50 mm2 . If a current of 25 amps is passed through the coil, find (i) m.m.f. (ii) reluctance of the ring and (iii) flux? defined & explained in the simplest way possible. Besides giving the explanation of A coil is wound uniformly with 300 turns over a steel ring of relative permeability 900, having a mean circumference of 40 mm and cross-sectional area of 50 mm2 . If a current of 25 amps is passed through the coil, find (i) m.m.f. (ii) reluctance of the ring and (iii) flux?, a detailed solution for A coil is wound uniformly with 300 turns over a steel ring of relative permeability 900, having a mean circumference of 40 mm and cross-sectional area of 50 mm2 . If a current of 25 amps is passed through the coil, find (i) m.m.f. (ii) reluctance of the ring and (iii) flux? has been provided alongside types of A coil is wound uniformly with 300 turns over a steel ring of relative permeability 900, having a mean circumference of 40 mm and cross-sectional area of 50 mm2 . If a current of 25 amps is passed through the coil, find (i) m.m.f. (ii) reluctance of the ring and (iii) flux? theory, EduRev gives you an ample number of questions to practice A coil is wound uniformly with 300 turns over a steel ring of relative permeability 900, having a mean circumference of 40 mm and cross-sectional area of 50 mm2 . If a current of 25 amps is passed through the coil, find (i) m.m.f. (ii) reluctance of the ring and (iii) flux? tests, examples and also practice Electrical Engineering (EE) tests.
Explore Courses for Electrical Engineering (EE) exam

Top Courses for Electrical Engineering (EE)

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev