A composite rod of wood & iron is rotating about a fixed axis 'A' with an angular velocity of ω. The lengths of the wood and iron portions is l each. Find the emf induced across the iron rod.
A
Bwl2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Bwl22
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
3Bwl22
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
2Bwl2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is C3Bwl22 Motional Emf due to a unifrom magnetic field is given by, emf=Bvavgl=B{lw+2lw2}.l=3Bwl22