Question

The thermal velocity of free electrons in a conductor depends upon (a) Length of the conductor (b) temperature (c) Cross sectional area of conductor (d) none of these​

Answer 1

Answer:

hi good morning

Explanation:

please follow

Answer 2

Explanation:

Correct option is

B

the temperature of the conductor

C

the potential difference applied across the ends of the conductor

D

the area of cross-section of the conductor

The drift speed of free electrons in a conductor is given by 

Vd=nAeI

where, n⟶ no. of free electrons

             I⟶ current flowing

            A⟶ Area of cross section

            e⟶ charge on electron

Now, if we increase the temperature, the resistance will increase resulting in decrease of current and hence drift velocity will increase. As current depends on potential, i.e., if we change it, it will definitely change the drift velocity.