Question

a battery of 18v is connected to a 3 m long unifirm wire having resistance of 100 ohm the difference of potential between two points

Answer 1

Explanation:

The potential drop across 3m will be 6V.

Let the potential drop across 50cm be E.

Since,  

L  

1

​

 

E  

q

​

 

​

=  

L  

2

​

 

E  

2

​

 

​

 

⟹  

3

6

​

=  

0.5

E

​

 

[E=2×0.5=1V