question

(a) write the relationship between mobility and drift velocity in a current carrying conductor.

(b) two aluminium wires have their lengths in the ratio 2 : 3 and radii in the ratio 1 : 3. these are connected in parallel across a battery of emf e and of negligible internal resistance. find the ratio of drift velocities of the electrons in the two wires.

 

 

 

 

 

 

 

a)

b)