The core of a toroid having 3000 turns has inner and outer radii of 11cm and 12cm respectively. The magnetic flux density in the core for a current of 0.70A is 2.5T. What is the relative permeability of the core?

A
484
B
584
C
384
D
684

Solution:

$\begin{aligned} B = \frac{μ Ni}{2 π r} r = \frac{11 + 12}{2} \times 10^{- 2}; μ = \frac{2 π rB}{Ni} \\ μ_{r} = \frac{μ}{μ_{0}} = \frac{2 π \times 11.5 \times 10^{- 2} \times 2.5}{4 π \times 10^{- 7} \times 3 \times 10^{3} \times 0.7} = 684 \end{aligned}$

FAQ Metallurgy JEE

Conservation of Biodiversity – Definition, Methods, Examples and Strategies

JEE Main Previous Year Papers Questions With Solutions Chemistry Nitro,Amine and Azo Compounds

Democratic Rights Class 9 Extra Questions Civics Chapter 6

Essay on All that Glitters is not Gold in English for Children and Students

Evans Tries an O-level Important Questions Class 12 English

Short and Long Essay on Corruption in English for Children and Students

Essay on Holi

Holi Wishes SMS and Messages for Mobile and Whatsapp

Solution:

Related content