If dielectric strength of air (minimum field required for ionisation of a medium) is `3 M V//m`, can a metal sphere of radius 1cm hold a charge of 1 coulomb ?

How many balls of radius 1 cm can be drawn by melting a metallic sphere of radius 3 cm?

How many metallic balls of radius 1 cm can be recast by melting a metallic sphere of radius 8 cm?

How many metallic cones of radius 3 cm and height 13.5 cm are required to construct a metallic sphere of radius 4.5 cm?

A conducting spehre has a radius 30 cm .If the dielectric strength of surrounding air is 3'10^(6) V/m, the maximum amount of charge the sphere can holdin micro coulombs is

To what potential, must we charge an insulated sphere of radius 14 cm so that its surface charge density of 1 muC m^(-2) ?

We have two metal plates of surface area 1m^(2) to construct an air parallel plate capacitor. A potential difference of 210 V is to be applied across the capacitor. The dielectric strength of air is 1 and electric field between the plates is 3xx10^(6)V//m . What can be the minimum separation between two plates? If the capacitor is constructed accordingly then how much charge it will hold when connected across a 210 V supply?

The electric field strength in air at NTP is 3 xx 10^(6)V//m . The maximum charge that can be given to a spherical conductor of radius 3m is

The electric intensity due to a charged conducting cylinder of radius 0.1 m at a distance of 1 m from the axis of the cylinder of charge density 1.77muC//m in a dielectric medium of dielectric constant 2 is