JEE Advanced2015PhysicsMagnetic Effects of CurrentActual
Paragraph: In a thin rectangular metallic strip a constant current I flows along the positive x -direction, as shown in the figure. The length, width and thickness of the strip are l, w and d , respectively. A uniform magnetic field B is applied on the strip along the positive y -direction. Due to this, the charge carriers experience a net deflection along the z -direction. This results in accumulation of charge carr
Options
- AIf B 1 = B 2 and n 1 = 2 n 2 , then V 2 = 2 V 1
- BIf B 1 = B 2 and n 1 = 2 n 2 , then V 2 = V 1
- CIf B 1 = 2 B 2 and n 1 = n 2 , then V 2 = 0.5 V 1
- DIf B 1 = 2 B 2 and n 1 = n 2 , then V 2 = V 1
Correct answer
A. If B 1 = B 2 and n 1 = 2 n 2 , then V 2 = 2 V 1
Step-by-step solution
As done in the above question V = B I n e d ∴ V ∝ B n Or V 1 V 2 = B 1 n 2 B 2 n 1 ∴ if B 1 = B 2 & n 1 = 2 n 2 ⇒ V 2 = 2 V 1 & if B 1 = 2 B 2 & n 1 = n 2 ⇒ V 2 = 0.5 V 1