Home
Class 12
PHYSICS
The drawing shows a coil of copper wire ...

The drawing shows a coil of copper wire that consists of two semicircles joined by straight sections of wire. In part (a) the coil is lying flat on a horizontal surface. The dashed line also lies in the plane of the horizontal surface. Starting from the orientaation in part (a) the smaller semicircle rotates at an angular frequency `omega` about the dashed line, until its place becomes perpendicular to the horizontal surface, as shown in part (b). A unifrom magnetic field B, constant in time and is directed upwards, perpendicular to the horizontal surface. The field completely fills the region occupied by the coil in either part of the drawing. The magnitude of the magnetic field is `B = 2 T`.
(a)
The resistance of the coil is `0.4 Omega`, and the smaller semicircle has a radius of `20 cm`. while the bigger one has a radius of `40 cm`. The angular frequency at which the small semicircle rotates is `omega = 15 rad//s`. Determine the average current I, if any, induced in the coil as the coil changes shape from that in part (a) of the drawing to that in part (b)

Promotional Banner

Similar Questions

Explore conceptually related problems

a semicircle wire of radius R is rotated with constant angular velocity about an axis passing through one end and perpendicular to the plane of wire. There is a uniform magnetic field of strength B . The induced emf between the ends is

a semicircle wire of radius R is rotated with constant angular velocity about an axis passing through one end and perpendicular to the plane of wire. There is a uniform magnetic field of strength B . The induced emf between the ends is

a semicircle wire of radius R is rotated with constant angular velocity about an axis passing through one end and perpendicular to the plane of wire. There is a uniform magnetic field of strength B . The induced emf between the ends is

Explain about dash line structure with a suitable example.

Electric current through the straight horizontal part of a wire is flowing from east to west. The force experienced by this part of the wire due to earth's magnetic field will be such as to pull it:

A solid cylinder of mass M and radius R rolls without slipping on a flat horizontal surface. Its moment of inertia about the line of contact is

A solid cylinder of mass M and radius R rolls without slipping on a flat horizontal surface. Its moment of inertia about the line of contact is ?

A solid sphere spinning about a horizontal axis with an angular velocity omega is placed on a horizontal surface. Subsequently it rolls without slipping with an angular velocity of :