Most Important Selected Qs for JEE AdvancedPhysicsElectromagnetic Induction
A conducting wire of length and mass m can slide without friction on two parallel rails and is connected to capacitance C. Whole system lies in a magnetic field B and a constant force F is applied to the rod. Then
Options
- Athe rod moves with constant velocity
- Bthe rod moves with an acceleration of F ~m + B ^2 ^2 c
- Cthere is constant charge on the capacitor.
- Dcharge on the capacitor increases with time
Correct answer
D. charge on the capacitor increases with time
Step-by-step solution
aligned & i = dq dt = d dt ( CvB )= CB dv dt = CB a & ~F - CB ^2 ^2 a = ma & a = F M + B ^2 ^2 C & emf increases & charge increase. aligned