Question:

A long straight wire of radius a carries a steady current I. The current is uniformly distributed across its cross section. The ratio of the magnetic field at a/2 and 2a from axis of the wire is :

(1) 1 : 4 

(2) 4 : 1 

(3) 1 : 1

(4) 3 : 4

                                                                     JEE-2024

Solution:                
A long straight wire of radius a carries a steady current I. The current is uniformly distributed across its cross section. The ratio of the magnetic field at a/2 and 2a from axis of the wire is : (1) 1 : 4 (2) 4 : 1 (3) 1 : 1 (4) 3 : 4 JEE-2024

Bhautik Study is a branch of knowledge that offers comprehensive solutions to a wide range of questions, aiding in preparation for exams such as JEE, NEET, CUET and NDA.