Dual Nature Of Radiation And Matter Mock Tests

The de Broglie wavelength of an electron accelerated through a potential difference V is proportional to:

The work function of a metal is 2.5 eV. The maximum wavelength of light that can cause photoelectric emission 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 with kinetic energy K is λ. If the kinetic energy is increased to 4K, the new wavelength is:

The de Broglie wavelength of an electron accelerated through potential V is proportional to:

Monochromatic light of wavelength 400 nm is incident on a metal surface with work function 2.0 eV. The maximum kinetic energy of the emitted photoelectrons is:

The work function of a metal is 2.3 eV. The threshold wavelength for photoelectric emission is approximately:

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

Light of wavelength 400 nm is incident on a metal surface with work function 1.9 eV. The maximum kinetic energy of the emitted photoelectrons is: