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Textbook Expert
Textbook ExpertVerified Tutor
13 Nov 2021

Given information

Consider the network of resistors  , , and   with a switch .

The voltage across each resistor   when the switch S is closed is:

 

 

 

 

Step-by-step explanation

Step 1.
Consider the network of resistors   ,  ,  and    with a switch  and the total current   as shown in the figure :
 
 
 
 
In this circuit, we see that   and   in parallel connections in the circuit, and is in series with these two 
 
From we have the total current   that goes to and then it gets divided into two resistors which are in parallel connection
 
 
When the switch has closed another resistor which is a parallel connection that is    and
 
 
For parallel connection, 
 
The equivalent resistance is lower than individual resistance
 
 
 
 
For series connection
 
The equivalent resistance is greater than individual resistance 
 
 
 
 
That means more current can be delivered by the battery. 
 

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