Question

Find the turns in an solenoid of inductance 23.4mH , current 2A and area 15cm. (a) 900 (b) 400 (c) 498 (d) 658 The question was posed to me in an interview for job. My query is from Magnostatic Energy in section Magnetostics of Electromagnetic Theory Select the correct answer from above options Electromagnetic Theory questions and answers, Electromagnetic Theory questions pdf, Electromagnetic Theory question bank, Electromagnetic Theory questions and answers pdf, mcq on Electromagnetic Theory pdf,electromagnetic theory book pdf,electromagnetic theory pdf notes,electromagnetic theory lecture notes,electromagnetic theory of light,maxwell electromagnetic theory,electromagnetic theory proposed by,electromagnetic theory engineering physics,electromagnetic theory nptel

Answer 1

The correct choice is (c) 498 The best I can explain: The inductance of any material(coil) is given by L = μ N^2A/I. Put L = 23.4 x 10^-3, I = 2 and A = 0.15, we get N as 498 turns.