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  4. Figure below shows a portion of an electric circuit with the currents in amperes and their directions. The magnitude and direction of the current in the portion P Q is

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Q. Figure below shows a portion of an electric circuit with the currents in amperes and their directions. The magnitude and direction of the current in the portion $P Q$ isPhysics Question Image

KVPYKVPY 2011

Solution:

Using Kirchhoff's junction rule, directions and magnitudes of currents are as,
image
Clearly, current in the portion $P Q$ is from $Q$ to $P$ is $6 A$.