1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

# A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a permanent magnet, such that magnetic field of intensity B is along the plane of the coil. If due to a current I in the triangle, a torque τ acts on it, then side l of the triangle is :

A
13(τBI)
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
2(τ3BI)12
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
23(τBI)12
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
4(τ3BI)12
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

## The correct option is B 2(τ√3BI)12 The current flowing clockwise in an equilateral triangle has a magnetic field in the direction of ^k. τ=BINAsinθ τ=BINAsin90∘ Area of equilateral triangle A=√34l2,N=1 τ=BI(√34l2) l2=(4τ√3BI) l=(4τ√3BI)12

Suggest Corrections
17
Join BYJU'S Learning Program
Related Videos
Force on a Current Carrying Wire
PHYSICS
Watch in App
Explore more
Join BYJU'S Learning Program