Physics · Force on a current-carrying conductor in a uniform magnetic field
Three long straight wires and are carrying currents as shown in figure. Then the
Three long straight wires \( A, B \) and \( C \) are carrying currents as shown in figure. Then the resultant force on B is directed
- A. perpendicular to the plane of the paper and outward
- B. perpendicular to the plane of the paper and inward
- C. towards \( A \)
- D. towards
Step-by-step solution
Assuming the wires are parallel and coplanar, the magnetic forces between parallel currents are attractive for same direction and repulsive for opposite directions. Without the figure, a common configuration is that currents in A and B are same direction, and C is opposite, causing a net force on B towards A due to attraction from A and repulsion from C, provided distances are equal.
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