NEET 2013 | Dual Nature of Radiation and Matter Question 32 | Physics

PREVIOUS NEXT

NEET 2013

MCQ (Single Correct Answer)

-1

The wavelength $$\lambda $$_e of an electron and $$\lambda $$_p of a photon of same energy E are related by

$${\lambda _p} \propto \sqrt {{\lambda _e}} $$

$${\lambda _p} \propto {1 \over {\sqrt {{\lambda _e}} }}$$

$${\lambda _p} \propto {\lambda _e}^2$$

$${\lambda _p} \propto {\lambda _e}$$

AIPMT 2012 Mains

MCQ (Single Correct Answer)

-1

Two radiations of photons energies 1 eV and 2.5 eV, successively illuminate a photosensitive metallic surface of work function 0.5 eV. The ratio of the maximum speeds of the emitted electrons is

1 : 4

1 : 2

1 : 1

1 : 5

AIPMT 2012 Mains

MCQ (Single Correct Answer)

-1

If the momentum of an electron is changed by P, then the de Broglie wavelength associated with changes by 0.5%. The initial momentum of electron will be

200 P

400 P

$${P \over {200}}$$

100 P

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a photosensitive material. The stopping potential is measured to be 3.57 V. The threshold frequency of the material is

4 $$ \times $$ 10¹⁵ Hz

5 $$ \times $$ 10¹⁵ Hz

1.6 $$ \times $$ 10¹⁵ Hz

2.5 $$ \times $$ 10¹⁵ Hz

PREVIOUS NEXT

NEET Subjects

Biology

Botany

Zoology

Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution