Test SeriesFree PYQsExamsPricing

MHT CET 2022 Physics question

PhysicsMoving Charges and MagnetismMHT CET 2022

Two identical long parallel wire carry currents 'I' an 'I' such that I> I. When the currents are in the same direction, the magnetic field at a point midway between the wires is 6 x 10 T. If the direction of I is reserved, the field becomes 3 x 10 T. the ratio is

Answer: (D)

Solution

Let the distance from each wire to the midpoint be ; each wire gives . For currents in the same direction the two fields at the midpoint are opposite, so T. When is reversed the fields add: $ = + =

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-094066