AIPMT 2006 | Dual Nature of Radiation and Matter Question 67 | Physics

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.

AIPMT 2005

MCQ (Single Correct Answer)

-1

The work functions for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein's equation the metals which will emit photoelectrons for a radiation of wavelength 4100 $$\mathop A\limits^ \circ $$ is/are

A only

A and B only

all the three metals

none

AIPMT 2005

MCQ (Single Correct Answer)

-1

A photosensitive metallic surface has work function, h$$\upsilon $$₀. If photons of energy $$2h{\upsilon _0}$$ fall on this surface, the electrons come out with a maximum velocity of 4 $$ \times $$ 10⁶ m/s. When the photon energy is increased to 5 h$$\upsilon $$₀, then maximum velocity of photoelectrons will be

2 $$ \times $$ 10⁷ m/s

2 $$ \times $$ 10⁶ m/s

8 $$ \times $$ 10⁶ m/s

8 $$ \times $$ 10⁵ m/s

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