AIPMT 2007 | Dual Nature of Radiation and Matter Question 64 | Physics

A 5 watt source emits monochromatic light of wavelength 5000 $$\mathop A\limits^ \circ $$. When placed 0.5 m away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of 1.0 m, the number of photoelectrons liberated will be reduced by a factor of

AIPMT 2006

MCQ (Single Correct Answer)

-1

The momentum of a photon of energy 1 MeV in kg m/s will be

5 $$ \times $$ 10^$$-$$22

0.33 $$ \times $$ 10⁶

7 $$ \times $$ 10^$$-$$24

10^$$-$$22

AIPMT 2006

MCQ (Single Correct Answer)

-1

When photons of energy h$$\upsilon $$ fall on an aluminimum plate (of work function E₀), photoelectrons of maximum kinetic energy K are ejected. If the frequency of radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be

K + h$$\upsilon $$

K + E₀

AIPMT 2006

MCQ (Single Correct Answer)

-1

A photocell employs photoelectric effect to convert

change in the frequency of light into a change in the electric current

change in the frequency of light into a change in electric voltage

change in the intensity of illumination into a change in photoelectric current

change in the intensity of illumination into a change in the work function of the photocathode.

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