From a cylinder of radius R, a cylider of radius `R//2` is removed, as shown in Fig. Current flowing in the remaining cylinder is I. Then, magnetic field strength is

From a solid sphere of mass M and radius R , a solid sphere of radius R//2 is removed as shown. Find gravitational force on mass m as shown

A cylinder of radius R_(1) have cylinderical cavity of radius R_(2) as shown in the figure and have current density J (down ward). Find Magnetic field when when point is in cavity

A cylinder of radius R_(1) have cylinderical cavity of radius R_(2) as shown in the figure and have current density J (down ward). Find Magnetic field when rgtR_(1) (on x-axis towards right)

There is a long cylinder of radius R having a cylindrical cavity of radius R//2 as shown in the figure. Apart from the cavity, the entire space inside the cylinder has a uniform mag- netic field parallel to the axis of the cylinder. The magnetic field starts changing at a uniform rate of (dB)/(dt) = kT//s . Find the induced electric field at a point inside the cavity.

A long wire bent as shown in fig. carries current I. If the radius of the semicircular portion is a, the magnetic field at centre C is

An infinity long cylinder of radius R has an infinitely long cylindrical cavity of radius (R)/(2) are shown in the figure. The remaining portion has uniform volume charge density rho . The magnitude of electrical field at the centre of the cavity is-

Inside a uniformly charged infinitely long cylinder of radius 'R' and volume charge density 'rho' there is a spherical cavity of radius 'R//2'. A point 'P' is located at a dsintance 2 R from the axis of the cylinder as shown. Then the electric field strength at the point 'P' is

A hemispherical portion of radius R is removed from the bottom of a cylinder of radius R. The volume of the remaining cylinder is V and its mass M. It is suspended by a string in a liquid of density rho where it stays vertical. The upper surface of the cylinder is at a depth h below the liquid surface. The force on the bottom of the cylinder by the liquid is