A conducting rod of length l and mass m is moving down a smooth inclined plane of inclination `theta` with constant i is flowing in the conductor in a direction perpendicular to paper inwards. A vertically upward magnetic field `vec B` exists in space. Then, magnitude of magnetic field `vec B` is

A conducting stick of length 2L and mass m is moving down a smooth inclined plane of inclination 60^(@) with constant speed 5m/s. A current 2A is flowing in the conductor perpendicular to the paper inwards. A vertically upward magnetic field B exists in space there. The magnitude of magnetic field B is

A conducting rod AB of length l=1m is moving at a velocity v_A=4m//s making an angle 30^@ with its length. A uniform magnetic field B=2T exists in a direction perpendicular to the plane of motion. Then

A conducting rod PQ of length l = 2m is moving at a speed of 2m s^(-1) making an angle of 30^(@) with its length. A uniform magnetic field B = 2T exists in a direction perpendicular to the plane of motin. Then

A conducting rod PQ of length l = 2m is moving at a speed of 2m s^(-1) making an angle of 30^(@) with its length. A uniform magnetic field B = 2T exists in a direction perpendicular to the plane of motin. Then

A conducting rod of length l is moving in a transverse magnetic field of strength B with veocity v. The resistance of the rod is R. The current in the rod is

A rectangular loop of dimensions (axxb) carries a current i. A uniform magnetic field vec(B)=B_(0) hat(i) exists in space. Then :

A conducting wire xy of lentgh l and mass m is sliding without friction on vertical conduction rails ab and cd as shown in figure. A uniform magnetic field B exists perpendicular to the plane of the rails, x moves with a constant velocity of

A conducting wire xy of lentgh l and mass m is sliding without friction on vertical conduction rails ab and cd as shown in figure. A uniform magnetic field B exists perpendicular to the plane of the rails, x moves with a constant velocity of

A rod of mass m , length l and resistance R is sliding down on a smooth inclined parallel rails with a cinstant velocity v . If a uniform horizontal magnetic field B exists, then find thevalue of B .

A wire of length L carries a current i along the x-axis. A magnetic field B=B_0(hati+hatj+hatk) exists in the space. Find the magnitude of the magnetic force acting on the wire.