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

A magnetic field of flux density 10T acts normal in a coil of 50 turns having 100cm2 area.The e.m.f induced if the coil is removed from magnetic field in 0.1 second is

A
50V
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
60V
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
80V
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
40V
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A 50V
Answer is A.
In this case, B = 10 T, N = 50 turns, A = 100cm2=102m2 and dt = 0.1 second.
We know that, ϕ1=NBAcosθ=NBA(ascosθ=cos0=1).
Therefore, ϕ1=50×10×102=5weber.
When the coil is removed from the magnetic field, B = 0.
So, ϕ2=0.
Therefore, (ϕ2ϕ2)=dϕ=(05)=5weber.
We also know that e = dϕdt=50.1=50V.
Hence, the emf induced if the coil is removed from the magnetic field in 0.1 second is 50 V.

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