A square-shaped wire loop of mass m, resistance R and side 'a' moving with speed v0, parallel to the x-axis, enters a region of uniform magnetic field B, which is perpendicular to the plane of the loop. The speed of the loop changes with distance x `(x lt a)` in the filed, as

A square-shaped conducting wire loop of dimension a moving parallel to the x-axis approaches a square region of size b (a lt b) where a uniform magnetic field B exists pointing into the plane of the paper (see figure). As the loop passes through this region, the plot correctly depicting its speed (v) as a function of x is

A square loop of side 20 cm and resistance 1 Omega is moved towards right with a constant speed v_0 . The right arm of the loop is in a uniform magnetic field of 5 T. The field is perpendicular to the plane of the loop and is going into it. The loop is connected to a network of resistors each of value 4 Omega. What should be the value of v_0 so that a steady current of 2 mA flows in the loop ?

A circular loop of radius R carrying a current is placed in a uniform magnetic field with its plane perpendicular to B. The force on the loop is

A square shaped current loop of side length L and carrying current I lies in a uniform magnetic field B acting perpendicular to the plane of squre loop and directed inward. The net magnetic force acting on current loop is

A wire loop of area A is placed in a uniform magnetic field B so that the directio of B is parallel to the plane of the coil. If B changes with time the emf induced in the loop will be

A conducting circular loop of radiius r carries a constant current i . It is placed in a uniform magnetic field vec(B)_(0) such that vec(B)_(0) is perpendicular to the plane of the loop . The magnetic force acting on the loop is

A conducting circular loop of radiius r carries a constant current i . It is placed in a uniform magnetic field vec(B)_(0) such that vec(B)_(0) is perpendicular to the plane of the loop . The magnetic force acting on the loop is

A square loop of side 1 mass m and resistance R falls vertically into a uniform magnetic field directed perpendicular to the plane of the coil.The height h through which the loop falls so that it attains terminal velocity on entering the region of magnetic field is given by

A square loop of side L, resistance R placed in a uniform magnetic field B acting normally to the plane of the loop. If we attempt to pull it out of the field with a constant velocity v, then the power needed is