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Q. 22

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 791

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Short Answer

Two of the three resistors in FIGURE EX28.22 are unknown but equal. The total resistance between points is is . What is the value of ?

The value of is

See the step by step solution

Step by Step Solution

Step 1: Given Information  

We have to find the value of .

Step 2: Simplify 

If two points and there are resistors connected at both ends of the points then it is called the resistors are connected in parallel. This is obvious when the resistors are aligned side by side. The potential difference across the resistors is the same in parallel connection. The equation shows the equivalent resistance for the parallel connection in the form

We have three resistors in parallel where and other two resistors are and . We are given the equivalent circuit by . By equation

Putting the value for into equation to get by

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