Electricity and magnetism - Current Electricity(find equivalet resistance)

1

rishabh ·2011-08-20 04:08:21

is it 4 ohm?

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oishitmitra ·2011-08-20 04:13:02

QUESTION: Each resistance is equal to r ohm. Find equivalent resistance between A and B.

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oishitmitra ·2011-08-20 04:17:34

no...its not 4 ohm.

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rishabh ·2011-08-20 04:22:05

for the first question,
the above 2 resistors (3 ohm) are shorted so it will just be both 2 ohms in series..thats wat i think.

see hcv for the second one...its simple

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oishitmitra ·2011-08-20 04:24:39

yes...u r ryt..srry

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1

Debosmit Majumder ·2011-08-20 04:28:19

the 2nd one....answer is coming R....(taking each resistance as R)

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oishitmitra ·2011-08-20 04:28:29

y dnt u try doing the 2nd question?

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oishitmitra ·2011-08-21 04:47:38

no debosmit its not R.
You have to find the shortest path that the current is flowing through and then calculate.
the answer is 5R/6.

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49

Subhomoy Bakshi ·2011-08-21 04:50:15

hint for second one: try finding out equipotential points..

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oishitmitra ·2011-08-21 04:51:16

Why dont u write down the solution buddy?!

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Debosmit Majumder ·2011-08-21 05:46:14

@subhomoy da: that`s what i`ve done....but my calculations maybe wrong....

yes,my calculations are wrong....its coming 5r/6...sry about that

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oishitmitra ·2011-08-21 07:49:21

cool!! nyc!! :)

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71

Vivek @ Born this Way ·2011-08-25 09:34:33

You can use either of the perpendicular or parallel symmetry to argue that.

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