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Electricity

Blazing goIITian

 Joined: 19 Mar 2012 Post: 421
2 May 2012 22:20:58 IST
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EQUIVALENT RESISTANCE
Engineering Entrance , Medical Entrance , AIPMT , JEE Main , AIIMS , JEE Advanced , Physics , Electricity

FIND THE EFFECTIVE RESISTANCE BETWEEN A&B. ALL THE BLACK COLOUR LINES HAVE R RESISTANCE AND ALL THE RED COLOUR LINES HAVE NO RESISTANCE.

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Blazing goIITian

Joined: 2 Mar 2012
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2 May 2012 22:30:09 IST
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## R/2

Blazing goIITian

Joined: 19 Mar 2012
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2 May 2012 22:36:33 IST
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Blazing goIITian

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2 May 2012 22:42:11 IST
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### OMG !!    Is the diagram correct ???

Blazing goIITian

Joined: 19 Mar 2012
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2 May 2012 22:47:24 IST
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YES THE DIAGRAM IS CORRECT. IT WAS AN OBJECTIVE QUESTION WHOSE ONE OPTION WAS R/2.SO MAY BE THE ANSWER GIVEN IS WRONG. HOW DID U GET R/2.

Blazing goIITian

Joined: 21 Mar 2012
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2 May 2012 22:50:48 IST
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Ya i got it answer is 7R/12

Blazing goIITian

Joined: 21 Mar 2012
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2 May 2012 22:51:23 IST
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Ya i got it answer is 7R/12

Blazing goIITian

Joined: 19 Mar 2012
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2 May 2012 22:53:18 IST
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HOWWWWWW

Blazing goIITian

Joined: 2 Mar 2012
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2 May 2012 23:01:09 IST
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1)  Remove red wire and take two ends (previouslyconnected by of red wire) to the centre.

2)  Replace all four R , R parrallel combinations of resistances thus formed bu res. R/2

3)  Two triangles are formed now....Upper triangle is an hanging resistance, detach it.

4) Lower triangle has Resistance R/2 across A,B.

Blazing goIITian

Joined: 19 Mar 2012
Posts: 421
2 May 2012 23:01:38 IST
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Blazing goIITian

Joined: 19 Mar 2012
Posts: 421
2 May 2012 23:08:55 IST
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WHY DID YOU REMOVE THE UPPER TRIANGLE????

Blazing goIITian

Joined: 21 Mar 2012
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2 May 2012 23:10:44 IST
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Wait a second yar

Blazing goIITian

Joined: 19 Mar 2012
Posts: 421
2 May 2012 23:11:24 IST
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@TARUN ,HOW DID U GET 7R/12?

Blazing goIITian

Joined: 21 Mar 2012
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2 May 2012 23:14:31 IST
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Yar the problem is dat i am operating through mob. So nt posible to insert image

Blazing goIITian

Joined: 19 Mar 2012
Posts: 421
2 May 2012 23:17:40 IST
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U TRY TO EXPLAIN WITHOUT THE IMAGE.I AM GETTING MAD GETTING WRONG ANSWERS.

Blazing goIITian

Joined: 21 Mar 2012
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2 May 2012 23:20:22 IST
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Ok chill draw the diagram on a page

Blazing goIITian

Joined: 21 Mar 2012
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2 May 2012 23:23:35 IST
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Nw u see the two digonal wire having resistance u shuld realise that if they touch each other there would be spark and circuit wil fuse so detach them as an upper section of both wire on one side of the wire and lower on the other

Blazing goIITian

Joined: 19 Mar 2012
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2 May 2012 23:25:52 IST
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OK

Blazing goIITian

Joined: 21 Mar 2012
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2 May 2012 23:26:50 IST
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Nw it wil b visible to u that upper section of digonal have resistance of triangle form by it WITH UPPERmost side as 2R/3 similarly the lower with AB as 2R/3 now draw its equivalent diagram nw tel me u get til there or nt

Blazing goIITian

Joined: 19 Mar 2012
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2 May 2012 23:29:19 IST
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DONE

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