Air given way when there is a gradient of potential of `3xx10^(6) ` valts per matre . What is the maximum voltage to which a sphere of radius 1 cm can be charged ? What is the chage required ?

A spark passes though air when the potential gradient is 3xx10^(6) volts per metre what must be the radious of an isoated metal sphere which can be changed to a potentiial of 3 million voilts before there are sparks in the air? ["Hint":E= (Q)/(4piepsi_(0)r^(2))and V=(Q)/(4piepsi_(o)r), thereforeE=(V)/(r)]

A conducting sphere of radius R=20 cm is given a charge Q=16muC . What it vecE at centre

The height of the cylinder of maximum volume which can be inscribed in a sphere of radius 3cm is

What is the number of wax balls, each of radius 1cm, that can be molded out of a sphere of radius 8cm?

If the earth is assumed to be a sphere of radius 6.4xx10^(3)km , then what will be its capacitance?

An insulated charged conducting sphere of radius 5cm has a potential of 10V at the surface. What is the potential at centre?

To what potential must a insulated sphere of radius 10 cm be charged so that the surface density of charge is equal of 1 muC//m^ 2 .

Assume that the nucleus of the fluorine atom is a sphere of radius 5xx10^(-3) cm. What is the density of matter in the nucleus?