Dual Nature Of Matter Mock Tests

Light of wavelength 500 nm is incident on a metal surface with work function 2.0 eV. The maximum kinetic energy of emitted photoelectrons is: (h = 6.626 × 10⁻³⁴ J s, c = 3 × 10⁸ m/s, 1 eV = 1.6 × 10⁻¹⁹ J)

The energy of a photon is directly proportional to its:

Light of wavelength 400 nm is incident on a metal surface with a work function of 2.0 eV. The maximum kinetic energy of the emitted photoelectrons is: (Take h = 6.626 × 10⁻³⁴ J s, c = 3 × 10⁸ m/s, 1 eV = 1.6 × 10⁻¹⁹ J)

A proton and an alpha particle are accelerated through the same potential difference. The ratio of their de Broglie wavelengths λ_p/λ_α is:

The work function of a metal is 2.5 eV. The threshold wavelength is: (hc = 1240 eV nm)

The number of photons per second from a 100 W bulb emitting light of wavelength 500 nm is approximately: (h = 6.626 × 10⁻³⁴ J s, c = 3 × 10⁸ m/s)

Light of wavelength 400 nm is incident on a metal surface with work function 2.0 eV. The maximum kinetic energy of emitted photoelectrons is: (Take h = 6.626 × 10⁻³⁴ J s, c = 3 × 10⁸ m/s, 1 eV = 1.6 × 10⁻¹⁹ J)

A photon of energy 4.0 eV is incident on a metal surface with work function 2.5 eV. The stopping potential is: