Magnetic Field Due to a Circular Arc at the Centre
Radius of cur...
Question
Radius of current carrying coil is ′R′. Then ratio of magnetic fields at the centre of the coil to the axial point, which is R√3 distance away from the centre of the coil is
A
1:1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
1:2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
1:4
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
8:1
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution
The correct option is D8:1 Magnetic field at centre Bcentre=μoi2R Magnetic field at any distance x from centreBaxial=μoiR22(x2+R2)32
Here, x=√3R Therefore, Baxial=μ0iR22(R2+(√3R)2)32 So, the ratio is BcentreBaxial=81=8:1