The radius of a circular conductor is 9.0 cm. Calculate its capacitance and the charge which makes its potential 1...

The radius of a sphere is measured to be (2.1+-0.5) cm. Calculate its surface area with error limits .

The radius of a sphere is measured to be (2.1 +- 0.02) cm . Calculate its surface area with error limits.

A parallel plate capacitor made of two circular plates each of radius 10 cm and separated by 4.0mm. The capacitor is being charged by an external source. The charging current is constant and equal to 0.10A. Calculate (i) the capacitance (ii) the rate of change of potential difference between the plates (iii) the displacement current.

(a) Derive an expression for energy density of a parallel plate capacitor. (b) Radius of a spherical conductor is 9 cm. A+4muC charge is given to it. Calculate the capacitance of conductor.

A capacitor consists of two circular plates each of radius 8.0 cm and separated by 3.0 mm. The capacitor is being charged by an external battery. The charging current is constant and is equal to 0.3 A. Calculate (i) capacitance of capacitor, (ii) the rate of change of potential difference across the plates of capacitor and (iii) the displacement current.

The circumference of a circular field is 528 cm . Then its radius is

The radius of right circular cylinder is 14 cm. If its total surface area is 3872 cm^(2) , then find its height.

The radius of a circular blot of oil is increasing at the rate of 2 cm/min. Find the rate of change of its area when its radius is 3 cm.

An object is placed 15 cm from a convex mirror of radius of curvature 90 cm. Calculate position of the image and its magnification.