By how much should a straight current-carrying conductor be turned from the…

MATHEMATICS · Single correct · ISC · Physics · Magnetic Effects of Current and Magnetism · Force on moving charges

Problem

By how much should a straight current-carrying conductor be turned from the perpendicular position so that the force acting on it becomes exactly one-half of its maximum possible value? (a) 30∘30^{\circ} (b) 60∘60^{\circ} (c) 75∘75^{\circ} (d) 45∘45^{\circ}

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