Two wires of same material having length
l ,2l and 2r, 3r are connected is parallel across a source of the current in shorter wire
is I,current in the longer wire is ?
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Explanation: taking r as resistance(cause its not described in question ) the current in longer wire is I
I = v/3r
v(which is constant )=3rI
now let the current in second wire is i an its resistance is 2r (given) so
v=i2r
3rI=i2r
i=3/2 (I)
hope it will help
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