Question

2. How does the mobility of electrons in a conductor change, if the potential difference applied across the conductor is doubled, keeping the length and temperature of the conductor constant?

Answer 1

Answer:

Explanation:

mobility if electrons =drift velocity/electric field .

this is the relation and drift velocity(Vd)=i/ena

as potential increases electric current increases.so mobility of electrons increases

Answer 2

If potential difference across the conductor is doubled, keeping the length same, the mobility of electrons in the conductor will be doubled.

Explanation:

This is because

We know that,            

                                     ⇒ Potential difference ∝ current

        Potential difference is directly proportional to current flowing through the conductor.

                                   ⇒ Current = $\frac{charge}{time}$

 

   It means current is equal to the charges flowing through the conductor per unit time.  

          It means if we double the voltage, the current will be doubled, that shows the charge per unit time will be doubled. Length and the temperature of the conductor is same regarding it's cross-sectional area.

So, the mobility of charges will increase to satisfy the above criteria.