In Fig. the bar AC has a mass of 50 g. It slides frictionlessly on the metal strips 40 cm apart at the edges of the incline. A current I flows through these strips and the bar, as shown. There is a magnetic field `|B_x| = 0.02 T` directed in the -y direction. How much must I be if the rod is to remain motionless? Neglect the slight overhang of the rod.

Current I is flowing through a vertical long wire in the upward direction. The magnetic field at a point on the east of the wire is

A current of I ampere is flowing through each of the bent wires as shown the magnitude and direction of magnetic field at O is

Inside a bar magnet the direction of the magnetic field lines is….. .

A 10 cm length of wire with a mass of 20g is attached frictionlessly to the vetical segments of a wire in which a current I flows. The surrounding has horizontal field B=10^4G and the vertical direction is shown in fig. What must be the current I (in A) to maintain the 10cm wire in an equilibrium position?

A 10 cm length of wire with a mass of 20g is attached frictionlessly to the vetical segments of a wire in which a current I flows. The surrounding has horizontal field B=10^4G and the vertical direction is shown in fig. What must be the current I (in A) to maintain the 10cm wire in an equilibrium position?

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.

On a smooth plane inclined at 30^(@) with the horizontal, a thin current carrying metallic rod is placed parallel to the horizontal ground. The plane is in a uniform magnetic field of 0.15T alon the vertical direction. For what value of current can the rod remain stationary ? the mass per unit lenght of the rod is 0.30 kg/m.