wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A permanent magnet has shape of a thin disc with magnetic moment along its axis the radius of the disc is 1 cm. The magnetic field due to it can be assumed to be that due to a molecular current I flowing along the rim of the disc. It ¯B at a distance of 10 cm from its centre on the axis is 30μT, find I (approximately).

A
1 k A
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
0.5 k A
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
2.5 k A
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
3 k A
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 0.5 k A
8=107×2×3.14×i×(1×102)2(10×102+1×102)3/2
30.0×106=6.28×101×i×104(11×10)3
i=0.5 kA

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Materials Kept in Magnetic Field
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon