Question

If E denotes electric field in a uniform conductor,I corresponding current through it, v_d-drift velocity of electrons and P denotes thermal power produced in the conductor, then which of the following graph is incorrect –

• A.
• B.
• C.
• D.

Answer 1

Answer: (C)

Answer 2

E = $\frac { \mathrm { V } } { \mathrm { d } }$ = = $\frac { \mathrm { i } \times \rho \mathrm { d } } { \mathrm { dA } }$ = $\frac { \operatorname { neAv } _ { \mathrm { d } } \rho } { \mathrm { A } }$ = nev_dr

v_d µ E straight line

P = I²R = × R = $\frac { \mathrm { E } ^ { 2 } \mathrm {~d} ^ { 2 } } { \rho \mathrm { d } } \times \mathrm { A }$

Ž P µ E² (Parabola)

P µ I² Parabola