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JEE Main2015PhysicsCurrent ElectricityActual

Suppose the drift velocity v d in a material varied with the applied electric field E as v d ∝ E . Then V - I graph for a wire made of such a material is best given by:

Correct answer

2

Step-by-step solution

We know that v d = k E and I = n   e   A   v d , ⇒ I = n   e A   k E ∵ E = V d ⇒ I = n e A k   V d ⇒ I ∝ V ⇒ V   ∝ I 2 . So,

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