1
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-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

A
6.4 V
B
2 eV
C
2 V
D
1.1 V
2
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-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 :

A
4 hv0
B
hv0
C
2 hv0
D
3 hv0
3
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-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 Vs respectively. The threshold frequency for this metal is

A
2v
B
3v
C
$${2 \over 3}$$v
D
$${3 \over 2}$$v
4
NEET 2021
MCQ (Single Correct Answer)
+4
-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)
A
1015
B
1018
C
1017
D
1016
NEET Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12