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PhysicsMagnetismMagnetic torque & energyEasy2 minPYQ_2022
PhysicsEasysingle choice

Two long parallel conductors S1 and S2 are separated by a distance 10 cm and carrying currents of 4 A and 2 A respectively. The conductors are placed along x-axis in X-Y plane. There is a point P located between the conductors (as shown in figure).
A charge particle of 3π coulomb is passing through the point P with velocity v=2i^+3j^ m s-1; where i^ & j^ represents unit vector along x & yaxis respectively.
The force acting on the charge particle is 4π×10-5-xi^+2j^ N. The value of x is 

Question diagram: Two long parallel conductors S 1 and S 2 are separated by a

Options:

Answer:
C
Solution:

Net magnetic field at P is BNet=μ0×i12πr1μ0i22πr2-k^

BNet =μ042π×4100-μ022π×6100

=μ0π×10012-16

=μ0π×10042×6

=μ0×1003π-k^

So, force acting on charge particle isF=qv×B=3π2i^+3j^μ0×1003π-k^

=4π×10-72i^+3j^×100-k^

=4π×10-52j^-3i^

  x=3

Stream:JEESubject:PhysicsTopic:MagnetismSubtopic:Magnetic torque & energy
2mℹ️ Source: PYQ_2022

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