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RESISTORS IN PARALLEL - QUESTIONS

V. Ryan 2002 - 2009

 

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1. Calculate the total resistance for the three resistors in parallel

   

The usual formula is seen opposite although it is easier to break down the calculation into two separate ones. These are similar to calculations you have attempted earlier.

To make the calculation easier calculate the total of the first two resistors.
   
 

   
 
   

 

   

Then, take the total of the first two resistors and perform the same calculation with the third resistor. This gives the overall total resistance.

   
   

2. Calculate the total resistance for the three resistors in parallel

 

   

First calculate the total resistance of the first two resistors.

   

Then, take the total of the first two resistors and perform the same calculation with the third resistor. This gives the overall total resistance.

   
   
 
   
 
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