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

# A long solenoid has 200 turns per cm and carries a current i. The magnetic field at its centre is 6.28×10−2Wbm−2. Another solenoid has 100 turns per cm and it carries a current i3. The value of the magnetic field at its centre :

A
1.05×104Wbm2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
1.05×102Wbm2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
1.05×105Wbm2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
1.05×103Wbm2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

## The correct option is B 1.05×10−2Wbm−2Let, B1=6.28×10−2Wbm−2,n1=200, n2=100 and B2 is the magnetic field at the center of other solenoid.For solenoid, B∝ni ⇒B1∝n1i1 and B2∝n2i2Therefore we can writeB2B1=n2i2n1i1B2=B1n2i2n1i1B2=6.28×10−2×100(i3)200iB2=6.28×10−26=1.05×10−2Wbm−2

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
Magnetic Field Due to a Current in a solenoid
PHYSICS
Watch in App
Join BYJU'S Learning Program