JEE Plances Class Answered
Find effective resistance between Aand B if resista
nce of each resistor is R
![](https://images.topperlearning.com/topper/tinymce/imagemanager/files/7826be57e5846fe58fe6bda12e0e05c65a01c6fca882d3.24786042IMG20171107163525.jpg)
Asked by venkat | 07 Nov, 2017, 20:15: PM
![](https://images.topperlearning.com/topper/tinymce/imagemanager/files/b22d99903eff7eea2fdb475ff54c63fd5a02b4807ebb24.65646440Phy81117Circuit01.png)
The Resistance network drawn above as per the question can be redrawn as given below
![](https://images.topperlearning.com/topper/tinymce/imagemanager/files/6bcf7eb5060e68fc387b3dc7cf984e625a02b5c60d2bd0.04358677Phy81117Circuit02.png)
In the above figure though all resistance are equal, they are labelled for convenience.
R1 is parallel to R2. R5 is parallel to R6. Hence the above figure can be redrawn considering
the effective resitance of R1 & R2 also R5 & R6
![](https://images.topperlearning.com/topper/tinymce/imagemanager/files/8391c9f498a83309a8758bbd53fc9e7b5a02b4b8bf50c3.62658660Phy81117Circuit03.png)
So from above figure it will be known that a resistance (R/2) + R is parallel to (R/2) + R.
Hence the effective resistance is 0.75×R
Answered by | 13 Nov, 2017, 11:13: AM