Determine the magnitude and direction of the electric field that can balance the weight of an electron.
`(m_e = 9.11 xx 10^31 kg, g = 10m//s^2)`

Calculate de Broglie wavelength of an electron (m = 9.1 xx 10^-31kg) moving with a velocity of 10^5 m//s .

Find the energy equivalent of the mass of an electron . Given mass of electron =9xx10^(-31) kg.

Find the electric field intensity in which an electron experiences a force equivalent to its own weight. (Take m_(e )= 9.1 xx 10^(-31)kg )

A steel wire of diameter 1 mm and length 2 m is stretched by a force of 2kg .wt , what is the increase in the length of wire ? (Y = 2 xx 10^11 N/m^2,g = 9.8m/s^2)

Find electric field intensity in which an electron experiences a force equivalent to its own weight. (take m_()=9.1 xx 10^(-31)kg )

A copper wire of 2.5 xx 10^-6 m^2 area carries a current of 1.6A. If the number density of the electrons in the wire is 8 xx 10^28//m^3 , then calculate the drift speed of the electrons in the wire (e = 1.6 xx 10^-19 C)