[" 1.The number of electrons striking the screen of "],[" CRT is "7.5times10^(15)" in "10" s.Calculate the electric "],[" current "]

The number of electrons striking the screen of CRT is 7.5xx10^(15) in 10 s. Calculate the electric current.

The number of electrons striking the screen of cathode ray tube is 7.5times10^(15) in 10 seconds calculate the electric current.

In a hydrogen atom, electron moves in an orbit of radius 5 xx 10^(-11) m with a speed of 2.2xx10^6 m/s . Calculate the equivalent current.

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)

State Joule's law of heating and give its mathematical form. An electric iron takes a current of 5A and develops 1.5 xx 10^(4) J of heat energy in 30 s. Calculate the resistance of the electric iron.

State Joule's law of heating and give its mathematical form. An electric iron takes a current of 5A and develops 1.5 xx 10^(4) J of heat energy in 30 s. Calculate the resistance of the electric iron.

" Treshold frequency for a metals is "5times10^(-14)S^(-1)" .Calculate the K.E.of excited electron when radiation of frequency "v=3times10^(15)S^(-1)

If the photon of the wavlength 150 pm strikes an atom and one of tis inner bound electron is ejectred out with a velocity of 1.5 xx 10^(7) ms^(-7) calculate the energy with which it is bound to the nucleus .