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

Two circular coils of radii 5cm and 10cm carry equal currents of 2A. The coils have 50 and 100 turns respectively, and are placed in such a way that their planes as well as their centers coincide. Magnitude of magnetic field at the common center of coils is

A
8π×106 T if current in the coils are in the same sense
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
4π×106 T if current in the coils are in the opposite sense
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
zero if current in the coils are in opposite sense
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
8π×106 T if current in the coils are in the opposite sense
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct options are
A 8π×106 T if current in the coils are in the same sense
D zero if current in the coils are in opposite sense
B1=n1mu0i12r1

B2=n2mu0i22r2

If currents are in the same sense:

B=B1+B2=μ0i2(n1r1+n2r2)=4π×107×22×(550+10100)×1102=8π×106T

If currents are in the opposite sense

B=B1+B2=μ0i2(n1r1n2r2)=4π×107×22×(55010100)×1102=0

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