NEET 2022 Phase 2 | Dual Nature of Radiation and Matter Question 9 | Physics

NEET 2022 Phase 2

MCQ (Single Correct Answer)

-1

The light rays having photons of energy 4.2 eV are falling on a metal surface having a work function of 2.2 eV. The stopping potential of the surface is

6.4 V

2 eV

2 V

1.1 V

NEET 2022 Phase 2

MCQ (Single Correct Answer)

-1

The threshold frequency of a photoelectric metal is v₀. If light of frequency 4v₀ is incident on this metal, then the maximum kinetic energy of emitted electrons will be :

4 hv₀

hv₀

2 hv₀

3 hv₀

NEET 2022 Phase 1

MCQ (Single Correct Answer)

-1

When two monochromatic lights of frequency, v and $${v \over 2}$$ are incident on a photoelectric metal, their stopping potential becomes $${{{V_s}} \over 2}$$ and V_s respectively. The threshold frequency for this metal is

$${2 \over 3}$$v

$${3 \over 2}$$v

NEET 2021

MCQ (Single Correct Answer)

-1

The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600nm, when it delivers the power of 3.3 $$\times$$ 10^$$-$$3 watt will be : (h = 6.6 $$\times$$ 10^$$-$$34 Js)

10¹⁵

10¹⁸

10¹⁷

10¹⁶

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