A circular plate of area `0.4 cm^(2)` is kept at distance of `2m` source of power `piW`. Find the amount of energy received by plate in `5` secs.

A circular plate of radius 2 cm is kept at a distance of 22 cm in front of a concave mirror. The focal length of mirror is 10 cm. Calculate the perimeter of image formed if plate is kept coaxially to the principal axis.

The capacitance of a parallel plate capacitor formed by the circular plates of diameter 4.0 cm is equal to the capacitance or a sphere of diameter 200 cm. Find the distance between two plates.

A parallel plate capacitor consist of two circular plates of area 0.04 m^2 each. They are separated by a distance 0.4 mm. If displacement current between the plates is 6A then rate of change in electric field between the plate w.r.t. time will be

A parallel plate capacitor consist of two circular plates of area 0.04 m^2 each. They are separated by a distance 0.4 mm. If displacement current between the plates is 6A then rate of change in electric field between the plate w.r.t. time will be

A point istropic light source of power P = 12 watt is located on the axis of a circular mirror plate of radius R = 3cm. If distance of source from the plate is alpha = 39 cm and reflection coefficient of mirror plate is alpha = 0.70, calcualte force exerted by light rays on the plate.

A parallel plate capacitor has plates of area 4 m^2 separated by distance of 0.5 mm. The capacitor is connected across a cell of emf 100 V. Find the capacitance, charge and energy stored in the capacitor.

A convex lens of focal length 30 cm is placed between a screen and a square plate of area 4cm^(2) . The image of the plate formed on the screen is 16cm^(2) . Calculate the distance between the plate and the screen.

The area of each plate of parallel plate condenser is 20cm^(2) and distance them is 2mm. It stores the energy if 5J. The energy density of electric field between its plates is

A parallel plate condenser is made up of two plates, each of surface area 40cm^(2) , separated by a distance of 0.4 cm. If a material of dielectric constant 10 is introduced between the plates, then the capacity of the condenser is

The plates of a parallel plate capacitance 1.0 F are separated by a distance d =1 cm. Find the plate area .