Question

Problem 22a

Answer 1

Given information

Given Data :

 

Assuming three resistors as    ,  and  and also internal resistance  is connected to a battery .

 

The voltage drop across each of these resistors :

 

=?

 

 

 

 

 

 

 

 

 

 

Step-by-step explanation

Step 1.

Consider three resistors as     and   are as shown in the figure :

 

 

Using the concept of parallel and series resistance of a resistor :

 

Case 1:

 

When the switch is closed :

 

From Figure, The equivalent resistance is given by :

 

  

 

Case 2:

 

When the switch is opened:

 

From Figure, The equivalent resistance is given by :

 

  

 

By Comparing Equation (1) and (2) of equivalent resistance it is clear that equivalent resistance increases when the switch is opened.