A rod closing the circuit shoew in the figure moves along a LI- shaped wire at a constant speed v under the action of the force F . The circult is in a unifron magnetic field perpendicluar to the plane . Calculate F if rate of heat generation in the circuit is Q.

A rod closing the circuit shown in Fig moves along a U shaped wire at a constant speed v under the action of the force F. The circuit is in a uniform magnetic field perpendicular to the plane. Calculate F if the rate of heat generation in the circuit is Q.

In the circuit shown in Fig. A conducting wire HE is moved with a constant speed v towards left. The complete circuit is placed in a uniform magnetic field vec(B) perpendicular to the plane of circuit inwards. The current in HKDE is

Imagine a would where free magnetic charges exist. In this world, a circuit is made with a U shape wire and a rod free to slide on it. A current carried by free magnetic charges can flow in the circuit. When the circuit is placed in a uniform electric field. E perpendicular to the plane of the plane of the circuit and the rod is pulled to the right with a constant speed v, the "magnetic EMF" in the current and the direction of the corresponding current. arising because of changing electric flux will be (l is the length of the rod and c is speed of light).

A particle of mass 'm' moves with a constant speed along a circular path of radius r under the action of a force F .Its speed is given by

A particle of mass M moves with constant speed along a circular path of radius r under the action of a force F. Its speed is

Consider the sliding wire circuit shown in . The wire slides at constant speed and the plane of the circuit is perpendicular to a uniform magnetic field. Show that the induced emf is given by E = Blv^(2)t//D foe 0 lt t lt D//v What is the expression for the emf for t gt D//v ?

A horizontal wire is free to slide on the verticle rails of a conducting frame as shown in figure. The wire has a mass m and length l and the resistance of the circuit is R . If a uniform magnetic field B is directed perpendicular to the frame, the terminal speed of the wire as it falls under the force of gravity 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) .

Figure shows a wire ab of length L and resistance R which can slide on a smooth pair of rails. I_(g) is current generator which supplies a constant current i in the circuit. If the wire ab slide at a speed v towards right, find the potential difference below a and b (b) The current generator I_(g) show in the figure sends a constant current i through the circiut. The wire ab has a length L and mass m and can slide on the smooth horizontal rails connect to I_(g) . The entire system lies in a vertical magnetic field B . Find the velocity of the wire as a function of time. (c) The system containing the rails and the wire of the previous part is kept vertically in a uniform horizontal magnetic field B that is perpendicular to the plane of the rails (figure). If is found that the wire stays in equilibrium. If th ewire ab is replaced by another wire of double its mass, how long will lit take in falling through a distance equal to its length? The current generator I_(g) shown in figure sends a constant current i through the circuit. The wire cd is fixed and wire ab is made to slide on the smooth, thick rails with a constant velocity v toward right. Each of these wires has resistance r . Find the current through the wire cd .