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Two very long parallel wires, separated by a distance d, carry equal current I in the same direction. At a certain instant of time, a point charge q is at a point P which is equidistant from the two wires, in the plane containing the two wires. If v is the velocity of the charge at this instant is perpendicular to this plane, the force due to magnetic field at P will.

Option: 1

accelerate the charged particle.


Option: 2

decelerate the charged particle.


Option: 3

make the particle oscillate between the two wires.


Option: 4

be zero.


Answers (1)

best_answer

Since the currents in the two wires are in the same direction, the magnetic fields due to the current I in the wire at point P exactly mid-way between them will be equal and opposite. The net magnetic field at point P is zero. So the correct choice is (d).

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Kuldeep Maurya

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