Find the capacitance of a capacitor having a charge of `6xx10^(-7)C` and energy of `4.5xx10^(-4)J`

Can be body have charge of 4 xx 10^(-19) C

What is the force between two small charged spheres having charges of 4 xx 10^(-7) C and 6 xx 10^(-7) C Placed 30 cm apart in air?

Can a body have charge fo 4 xx 10^19 C

Calculate the de Broglie wavelength associated with an alpha -particle having an energy of 7.7xx10^(-13)J and a mass of 6.6xx10^(-24)g.(h=6.6xx10^(-34)J-s) .

The area of a parallel plate capacitor is 6xx10^(-3)m^(2) . The distance of separation of two plates is 3xx10^(-3)m . Calculate the capacitance of the above capacitor. If the capacitor is charged to potential of 100 V then calculate the charge on each plate.

Find the wave number of a photon having an energy of 2.072 eV. Given : Charge on electron =1.6xx10^(-19)C Velocity of light air =3xx10^(8)" m"//"s" Planck's constant =6.63xx10^(-34)" J-s" .

What is the radius of the path of an electron (mass 9xx10^(-31)kg and charge 1*6xx10^(-19)C ) moving at a speed of 3xx10^7ms^-1 in a magnetic field of 6xx10^-4T perpendicular to it? What is its frequency? Calcualte its energy in keV .