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(C) $1$. Two parallel wires carrying currents in the same direction attract each other, while wires carrying currents in opposite directions repel eac

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$C$

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(C) $1$. Two parallel wires carrying currents in the same direction attract each other, while wires carrying currents in opposite directions repel each other.$2$. Wire $P$ carries current into the paper $(\otimes)$, wire $Q$ carries current out of the paper $(\odot)$, and wire $R$ carries current into the paper $(\otimes)$.$3$. Since $P$ and $Q$ have currents in opposite directions, wire $Q$ exerts a repulsive force on $P$, pushing it to the left (away from $Q$). Let this force be $F_Q$.$4$. Since $P$ and $R$ have currents in the same direction, wire $R$ exerts an attractive force on $P$, pulling it downwards (towards $R$). Let this force be $F_R$.$5$. The resultant force $F$ on wire $P$ is the vector sum of $F_Q$ and $F_R$. Since both forces have the same magnitude, the resultant force $F$ will point in the direction of arrow $C$, which bisects the angle between the horizontal and vertical directions.

The figure shows three long straight wires $P, Q$ and $R$ carrying currents normal to the plane of the paper. All three currents have the same magnitude. Which arrow best shows the direction of the resultant force on the wire $P$?

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