AIPMT 2011 Prelims | Dual Nature of Radiation and Matter Question 47 | Physics

AIPMT 2011 Prelims

MCQ (Single Correct Answer)

-1

In photoelectric emission process from a metal of work function 1.8 eV, the kinetic energy of most energetic electrons is 0.5 eV. The corresponding stopping potential is

1.8 V

1.3 V

0.5 V

2.3 V

AIPMT 2010 Mains

MCQ (Single Correct Answer)

-1

When monochromatic radiation of intensity $$I$$ falls on a metal surface, the number of photoelectrons and their maximum kinetic energy are N and T respectively. If the intensity of radiation is 2$$I$$, the number of emitted electrons and their maximum kinetic energy are respectively

N and 2T

2N and T

2N and 2T

N and T

AIPMT 2010 Mains

MCQ (Single Correct Answer)

-1

The electron in the hydrogen atom jumps from excited state (n = 3) to its ground state (n = 1) and the photons thus emitted irradiate a photosensitive material. If the work function of the material is 5.1 eV, the stopping potential is estimated to be (the energy of the electron in n^th state E_n = $${{ - 13.6} \over {{n^2}}}eV$$)

5.1 V

12.1 V

17.2 V

7 V

AIPMT 2010 Prelims

MCQ (Single Correct Answer)

-1

A beam of cathode rays is subjected to crossed electric (E) and magnetic fields (B). The fields are adjusted such that the beam is not deflected. The specific charge of the cathode rays is given by

(Where V is the potential difference between cathode and anode)

$${{{B^2}} \over {2V{E^2}}}$$

$${{2V{B^2}} \over {{E^2}}}$$

$${{2V{E^2}} \over {{B^2}}}$$

$${{{E^2}} \over {2V{B^2}}}$$

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