AIPMT 2012 Mains | Dual Nature of Radiation and Matter Question 37 | Physics

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 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 Prelims

MCQ (Single Correct Answer)

-1

An $$\alpha $$-particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of 0.25 Wb/m². The de Broglie wavelength associated with the particle will be

1 $$\mathop A\limits^ \circ $$

0.1 $$\mathop A\limits^ \circ $$

10 $$\mathop A\limits^ \circ $$

0.01 $$\mathop A\limits^ \circ $$

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

A 200 W sodium street lamp emits yellow light of wavelength 0.6 $$\mu $$m. Assuming it to be 25% efficient in converting electrical energy to light, the number of photons of yellow light it emits per second is

1.5 $$ \times $$ 10²⁰

6 $$ \times $$ 10¹⁸

62 $$ \times $$ 10²⁰

3 $$ \times $$ 10¹⁹

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