The mass of an electron is `9.1 xx 10^-31` kg. If its K.E is `3.0 xx 10^-25` J . Calculate its wavelength.

The energy of a photon is 10 xx 10^-19J .Calculate its wavelength.

The work function of silver is 5.26 xx 10^-19J . Calculate its threshold wavelength.

The moment if inertia of the earth about its axis of rotation is 9.83 xx 10^37 kgm^2 and if its angular velocity is 7.3 xx 10^-5 rad s^-1 . Calculate Radius of gyration

The moment if inertia of the earth about its axis of rotation is 9.83 xx 10^37 kgm^2 and if its angular velocity is 7.3 xx 10^-5 rad s^-1 . Calculate Kinetic Energy of rotation.

The photoelectric work function of a photo-sensitive metal is 3 xx10^-19 J. Calculate the threshold wavelength.

If the velocity of the electron in Bohr's first orbit is 2.19 xx 10^6 ms^-1 , calculate the de Broglie wavelength associated with it.

An electron is moving with a velocity of 0.25 c and rest mass is 9.1 xx 10^-31 kg . Calculate the de Broglie wavelength linked with the electron.

An electron is moving with a speed of 3 xx 10^7m//s in a magnetic field of 6 xx 10^-4 T perpendicular to its path. What will be the radius of the path? What will be the frequency and the energy in keV? Given: mass of electron = 9 xx 10^-31 kg , charge e = 1.6 xx 10^-19C , lev = 1.6 xx 10^-19 J .

The frequency of an electromagnetic radiation is 2 xx 10^6 Hz . What is its wavelength in metres? (velocity of light is 3 xx 10^8 ms^-1 )