AIPMT 2014 | Dual Nature of Radiation and Matter Question 30 | Physics

AIPMT 2014

MCQ (Single Correct Answer)

-1

When the energy of the incident radiation is increased nby 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is

0.65 eV

1.0 eV

1.3 eV

1.5 eV

AIPMT 2014

MCQ (Single Correct Answer)

-1

If the kinetic energy of the particle is increased to 16 times its previous value, the percentage change in the de Broglie wavelength of the particle is

NEET 2013 (Karnataka)

MCQ (Single Correct Answer)

-1

A source of light is placed at a distance of 50 cm from a photo cell and the stopping potential is found to be V₀. If the distance between the light source and photo cell is made 25 cm, the new stopping potential will be :

V₀/2

V₀

4V₀

2V₀

NEET 2013 (Karnataka)

MCQ (Single Correct Answer)

-1

The de-broglie wavelength of neutrons in thermal equilibrium at temperature T is

$${{3.08} \over {\sqrt T }}\mathop A\limits^ \circ $$

$${{0.308} \over {\sqrt T }}\mathop A\limits^ \circ $$

$${{0.0308} \over {\sqrt T }}\mathop A\limits^ \circ $$

$${{30.8} \over {\sqrt T }}\mathop A\limits^ \circ $$

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