`9.363xx10^19` electrons pass,through an area per minute. What is,the electric current?

A spherical conductor of radius 12 cm has a charge 1.6xx10^(-7) C distributed uniformly on its surface. What is the electric filed inside the sphere

A spherical conductor of radius 12 cm has a charge 1.6xx10^(-7) C distributed uniformly on its surface. What is the electric filed outside the sphere.

Using Biot-Savart Law find the magnetic field intesity due to current carrying loop at an external point on the axis that passes perpendiculary to the plane of the loop through the centre. What is the field intensity at the centre?

Two resistances of 5 ohm and 10 ohm are connected in parallel and then a current is passed through them from a battery of 6 volt. Calculate the currents drawn from the battery and also the currents flowing through each of the resistances.

A steam engine delivers 5.4 xx 10^8 J of work per minute and services 3.6 XX 10^8 J of heat per minute from its boiler. What is the efficiency of the engine? How much heat is wasted per minute?