Question

Problem 24d

Answer 1

Given information

All have the same resistance

 

 

 

Voltage  

 

The current through each resistor before

 

  

  

    

and after closing the switch 

  

  

    

Qualitative predictions confirmed =?

 

Step-by-step explanation

Step 1.

Consider the network of resistors  ,  ,     and   with total current  is shown in the figure :

 

Case 1:

 

When the switch is open:

 

 and    are in parallel combined with in series.

 

The equivalent resistance is given by :

 

 

 

Current from the battery is given by :

 

   

 

Since there are increases in current   and 

 

  because in series connection with the battery