As shown in the figure a metal rod makes contact and complete the circuit. The circuit is perpendicular to the magnetic field with If the resistance is 3Ω , force needed to move the rod as indicated with a constant speed of 2m/sec is
Induced current in the circuit
Magnetic force acting on the wire External force needed to move the rod with constant velocity
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Two infinitely current carrying insulated wires AB and CD are carrying same current I. The wires cross each other at right angles as shown in figure. Three identical conductors P1Q1 , P2Q2 and P3Q3, carrying same current are placed a shown in figure and the forces acting on them are F1 , F2 and F3 respectively. Then select the correct option.
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