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:

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

Start Free Mock LoginAlready registered? Login here

Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityMicroscopicMedium2 minQB

PhysicsMediumsingle choice

Suppose the drift velocity $v_{d}$ in a material varied with the applied electric field E as $v_{d} \propto E$ . Then $V - I$ graph for a wire made of such a material is best given by:

Options:

Answer:

Solution:

We know that $v_{d} = k E$ and $I = n e A v_{d}$ ,

$\Rightarrow I = n e A k E$ $∵$ $E = \frac{V}{d} \Rightarrow I = n e A k \frac{V}{d}$

$\Rightarrow I \propto V \Rightarrow V \propto I^{2}$ . So,

Stream:JEESubject:PhysicsTopic:Current ElectricitySubtopic:Microscopic

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...