Suppose the drift velocity `v_(d)` in a material varied with the applied electric field E as `v_(d) prop sqrt(E)`. Then V – I graph for a wire made of such a material is best given by :

Options

A.
B.
C.
D.

Answer

B

Explanation

`I = n eAv_(d)` Drift velocity is given to be proportional to square root of electric field intensity.
`I prop sqrtE`
`rArr I^(2) prop E`
Since Electric field and potential difference are proportional to each other, hence we can write the following
`I^(2) prop V`