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  4. In the following network, the current flowing through 15 Ω resistance is <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/17a2e3476557067223d4b31c2a1151a6-.png />

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Q. In the following network, the current flowing through 15 $\Omega$ resistance is
image

MHT CETMHT CET 2018Current Electricity

Solution:

image
Above circuit is a balanced Wheatstone bridge.
Hence, the above circuit is drawn in the following manner
image
From the above circuit,
$18 I =24(21-1) $
$18 I =504-24I$
$24 I+18I =504 $
$42I=504 $
$I =\frac{504}{42} $
$ \therefore I =1.2 A $