What will be the work done in carrying a charge q once round a circle of radius r with a charge Q at the center? A grounded conducting sphere of radius a is placed in a uniform electric field E with its center at the origin. What will be the induced charge density What is the square of the length of the four vector? If an electromagnetic wave incident obliquely at the surface of dielectric medium 2 from dielectric medium 1.The angle ofTST incident and the critical angle are respectively. Then what is the cCondition for total internal reflection? 2 Magnetic induction Bis related to 5| magnetic field H by the relation B-.What is ? Write the value and unit of it.