A thin uniform rod with negligible mass and length `l` is attached to the floor by a frictionless hinge at point `P`. A horizontal spring with force constant `k` connects the other end to wall. The rod is in a uniform magnetic field `B` directed into the plane of paper. What is extension in spring in equilibrium when a current is passed through the rod in direction shown? Assuming spring to be in natural length initially and it remains perpendicular to wall always.

A thin, uniform rod with negligible mass and length 0.200m is attached to the floor by a frictionless hinge at point P (as shown in fig) A horizontal spring with force constant k=4.80Nm^-1 connects the other end of the rod to a vertical wall.The rod is in a uniform magnetic field B=0.340T directed into the plane of the figure. There is current I=6.50 A in the rod, in the direction shown. When the rod is in equilibrium and makes an angle of 53.0^@ with the floor, is the spring stretched or compressed?

A thin, uniform rod with negligible mass and length 0.200m is attached to the floor by a frictionless hinge at point P (as shown in fig) A horizontal spring with force constant k=4.80Nm^-1 connects the other end of the rod to a vertical wall. The rod to a vertical wall. The rod is in a uniform magnetic field B=0.340T directed into the plane of the figure. There is current I=6.50 A in the rod, in the direction shown. When the rod is in equilibrium and makes an angle of 53.0^@ with the floor, is the spring stretched or compressed?

A thin, uniform rod with negligible mass and length 0.200m is attached to the floor by a frictionless hinge at point P (as shown in fig) A horizontal spring with force constant k=4.80Nm^-1 connects the other end of the rod to a vertical wall. The rod to a vertical wall. The rod is in a uniform magnetic field B=0.340T directed into the plane of the figure. There is current I=6.50 A in the rod, in the direction shown. When the rod is in equilibrium and makes an angle of 53.0^@ with the floor, is the spring stretched or compressed?

A thin, uniform rod with negligible mass and length 0.200m is attached to the floor by a frictionless hinge at point P (as shown in fig) A horizontal spring with force constant k=4.80Nm^-1 connects the other end of the rod to a vertical wall. The rod to a vertical wall. The rod is in a uniform magnetic field B=0.340T directed into the plane of the figure. There is current I=6.50 A in the rod, in the direction shown. Calculate the torque due to the magnetic force on the rod, for an axis at P.

A thin, uniform rod with negligible mass and length 0.200m is attached to the floor by a frictionless hinge at point P (as shown in fig) A horizontal spring with force constant k=4.80Nm^-1 connects the other end of the rod to a vertical wall. The rod to a vertical wall. The rod is in a uniform magnetic field B=0.340T directed into the plane of the figure. There is current I=6.50 A in the rod, in the direction shown. Calculate the torque due to the magnetic force on the rod, for an axis at P.

A current carrying wire of length l is suspended horizontally by a spring of force constant K as shown. The system is in equilibrium. A magnetic field B is switched on into the plane of paper suddenly. Which of the following statements is correct

A current carrying wire of length l is suspended horizontally by a spring of force constant K as shown. The system is in equilibrium. A magnetic field B is switched on into the plane of paper suddenly. Which of the following statements is correct