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  4. What current will flow through the 2 kΩ resistor in the circuit shown in the figure?

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Q. What current will flow through the $2\,k\Omega$ resistor in the circuit shown in the figure?Physics Question Image

WBJEEWBJEE 2012Current Electricity

Solution:

From KCL we have
image
$i =\frac{72}{8 \times 10^{3}}=9 \times 10^{-3} A$
$i \times 6 =(9-i) \times 3$
$i =3\, mA$