Physics, asked by Anonymous, 1 year ago

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Anonymous: on this one

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Answered by ZiaAzhar89
2
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Along the path ACDB



VB=V4 +1V +2 x 1V - 2V

=0+1+2-2

=1V

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Anonymous: tell me... y u hav taken (2x1) that is pot. along resistance in positive
Anonymous: along the direction of current flow potential decrease. .. it should be in -ve naa!
Anonymous: u can take any direction the opposite direction shud be negative but the answer will come !
Anonymous: solve it by taking diff. direction
Anonymous: I mean opp. direction
Answered by Anonymous
2

First note that :

In BD , 2 A current flows .

In AC , 1 A current flows .

Hence in DC the current will be 2 A - 1 A

                                                    = 1 A

In ACDB ,

In DC voltage = IR

                       = 1 A × 2 ohms

                       = 2 v

Note the direction of currents and add the total potential differences of the resistors :

V at B = - 2 v + 2 v + 1 v

          = + 1 v

+ 1 v is the potential difference at B

ANSWER :

OPTION ( 1 )

Hope it helps !

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