Dual Nature Of Matter Mock Tests

A photon of energy 4.2 eV is incident on a metal surface with work function 2.2 eV. The stopping potential for the emitted photoelectrons is:

A photon of wavelength 4000 Å strikes a metal surface with work function 2.2 eV. The stopping potential for the emitted photoelectrons is:

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: (h = 6.626 × 10⁻³⁴ J s, c = 3 × 10⁸ m/s, 1 eV = 1.6 × 10⁻¹⁹ J)

The de Broglie wavelength of a particle is given by (where p is the momentum):

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: (h = 6.626 x 10^-34 J s, c = 3 x 10^8 m/s, 1 eV = 1.6 x 10^-19 J)

An electron and a proton are accelerated through the same potential difference. Which of the following has the greater de Broglie wavelength?

An electron and a proton have the same de Broglie wavelength. Which one has greater kinetic energy?

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: (h = 4 × 10⁻¹⁵ eV s, c = 3 × 10⁸ m/s)