A uniformly charged insulating rod of length 'L has a total charge 'Q'. It is bent into the shape of a semicircle as shown in the figure. Electric field strength at O can be expressed as O у

A long wire carrying current 'I' is bent into the shape as shown in the figure. The net magnetic field intensity at the centre 'O' is

A uniform wire of length l and mass M is bent in the shape of a semicircle of radius r as shown in figure. Calculate moment of intertia about the axis XX'

A positive charge Q is uniformly distributed across a rod of length L. The rod is then bent in the form of a semicircle. What will be the electric field intensity at the centre of curvature of the semicircle thus formed?

A positive charge Q is uniformly distributed along the length L of a rod. It is bent in the shape of a square. Calculate electric field intensity at the centre of the square.

Positive charge Q is uniformly distributed across a thin rod of length L. The rod is then bent in the form of a semicircle. What will be the electric potential at the centre of curvature of semicircle formed?

A uniformly charged sphere, made up of non-conducting material and carrying charge Q, is placed near a uniformly charged non-conducting rod, carrying charge q. The centre of the sphere lies on the perpendicular bisector of the rod as shown in the figure. Calculate the force exerted by the sphere on the rod.

A long wire with a uniform charge density lambda is bent in two configurations shown in fig. Determine the electric field intensity at point O.

A solid hemispherical uniformly charged body having charge Q is kept symmetrically along the y -axis as shown in the figure. The net electric field at ( d , 0 , 0 ) is