A magnetic field given by B(t) `=0.2t-0.05t^(2)` tesla is directed perpendicular to the plane of a circular coil containing 25 turns of radius 1.8 cm and whose total resistance is `1.5Omega`. The power dissipation at 3 s is approximately

A magnetic field B= 2t + 4t^(2) (where t= time) is applied perpendicular to the plane of a circular wire of radius r and resistance R. If all the units are in SI the electric charge that flows through the circular wire during t=0s to t= 2s is

A coil of area 10cm^2 and 10 turns is in magnetic field directed perpendicular to the plane and changing at a rate of 10^8 gauss//s . The resistance of coil is 20Omega . The current in the coil will be

A coil of area 10cm^2 and 10 turns is in magnetic field directed perpendicular to the plane and changing at a rate of 10^8 gauss//s . The resistance of coil is 20Omega . The current in the coil will be

A coil of area 10cm^2 and 10 turns is in magnetic field directed perpendicular to the plane and changing at a rate of 10^8 gauss//s . The resistance of coil is 20Omega . The current in the coil will be

A circular coil of area 0.2m^(2),250 turns,and resistance 5 Omega is placed in magnetic,field.The magnetic field is directed,perpendicular to the plane of coil and it is,increased from "0.01T" to 0.06 during a ,time interval of 0.25s ,the average,induced current in the coil is

A coil cosists of 400 turns of wire. Each turn is a square of side d= 20 cm. A uniform magnetic field directed perpendicular to the plane of the coil is turned on. If the field changes linearly from 0 to 0.50 T in 0.8 s, what is the magnitude of induced emf in the coil while is the field is changing?