ElectroMagnetic InductionHard
Question
The figure shows a rod of length l with points A and B on it. The rod is moved in a uniform magnetic field (B0) in different ways as shown. In which case potential difference (VA - VB) between A & B is minimum?
Options
A.
B.
C.
D.
Solution
For (A) : VB - VA = 
Bωl2 ⇒ VA - VB = - 
Bωl2
For (B) : VB - VA = Bvl = B
l = 
Bωl2 ⇒ VA - VB = - 
Bωl2
For (C) : VA - VB = 0
For (D) : VB - VA =
Bωl2 - 
Bω
= 
Bωl2 ⇒ VA - VB = - 
Bωl2
Bωl2 ⇒ VA - VB = - Bωl2For (B) : VB - VA = Bvl = B
l = Bωl2 ⇒ VA - VB = - Bωl2For (C) : VA - VB = 0
For (D) : VB - VA =
Bωl2 - Bω= Bωl2 ⇒ VA - VB = - Bωl2Create a free account to view solution
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