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

When a short bar magnet is kept at a distance of 20 cm from the centre of D.M., in Tan A position, the deflection is 450 . If H=30 A/m, the moment of the magnet is :


A
1.5 × 102 Am2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
1.51Am2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
3.01Am2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
1.31Am2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 1.51Am2
The deflection off the magnetic needle in tan A position by a short magnet is given by
μo4π2MAd3=BHtanθA
θ=45o
B=μo×H
4π×107×30=107×2Md3
M=1.51Am2

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