A 1 m long metal rod XY completes the circuit as shown in figureThe plane of the circuit is perpendicular to the magnetic field of flux density 0.15 T.If the resistance of the circuit is 5`Omega`,the force needed to move the rod in direction,as indicated, with a constant speed of 4 m/s will be_________ `10^(-3)N.

A 0.5m long metal rod PQ completes the circuit as shown in the figure. The area of the circuit is perpendicular to the magnetic field of flux density 0.15 T . If the resistance of the total circuit is 3Omega calculate the force needed to move the rod in the direction as indicated with a constant speed of 2 ms^(-1)

As shown in figure, a metal rod completes the circuit. The circuit area is perpendicular to a magnetic field with B = 0.15 T . If the resistance of the total circuit is 3 Omega , how large a force is needed to move the rod as indicated with a constant speed of 2 m/s?

As shown in the figure a metal rod makes contact and complete the circuit. The circuite is perpendicular to the magnetic field with B=0.15 tesla. If the resistance is 3Omega force needed to move the rod as indicated with a constant speed of 2m//sec is

A metallic rod completes its circuit as shown in the figure. The circuit is normal to a magnetic field of B=0.15 tesla. If the resistances of the rod is 3Omega the force required to move the rod with a constant velocity of 2m//sec is-

A metal rod of length l cuts across a uniform magnetic field B with a velocity v. If the resistance of the circuit of which the rod forms a part is r, then the force required to move the rod is

A metal rod 1/(sqrt(pi)) m long rotates about one of its ends in a plane perpendicular to a magnetic field of induction 4 xx 10^(-3)T . If the emf induced between the ends of the rod is 16 mv, then the number of revolutions made by the rod per second is

A metal rod of length 2 m is rotating with an angular velocity of 100 rad//sec in a plane perpendicular to a uniform magnetic field of 0.3 T . The potential difference between the ends of the rod is

The conducting rod ab shown in figure makes contact with metal rails ca and db . The apparatus is in a uniform magnetic field 0.800 T , perpendicular to the plane of the figure. (a) Find the magnitude of the emf induced in the rod when it is moving toward the right with a speed 7.50 m//s . (b) In what direction does the current flow in the rod? (c) If the resistance of the circuit abdc is 1.50 Omega (assumed to be constant), find the force (magnitude and direction) required to keep the rod moving to the right with a constant speed of 7.50 m//s . You can ignore friction. (d) Compare the rate at which mechanical work is done by the force (Fu) with the rate at which thermal energy is developed in the circuit (I^2R) .