Five current-carrying conductors meet at poin | vedclass

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Question

(B) According to Kirchhoff's first law (junction rule), the algebraic sum of currents meeting at a junction is zero. Let the current $I$ in conductor

Vedclass · Accepted Answer

$1 \,A$ from $P$ to $Q$

Vedclass · Answer

(B) According to Kirchhoff's first law (junction rule), the algebraic sum of currents meeting at a junction is zero. Let the current $I$ in conductor $PQ$ be directed away from point $P$.Sum of incoming currents = Sum of outgoing currents$5 \,A + 4 \,A = 5 \,A + 3 \,A + I$$9 \,A = 8 \,A + I$$I = 9 \,A - 8 \,A = 1 \,A$Since the result is positive, the assumed direction (away from $P$) is correct. Therefore, $1 \,A$ current flows from $P$ to $Q$.

Five current-carrying conductors meet at point $P$. What is the magnitude and direction of the current in conductor $PQ$?

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