1
JEE Main 2020 (Online) 4th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In a photoelectric effect experiment, the graph of stopping potential V versus reciprocal of wavelength obtained is shown in the figure. As the intensity of incident radiation is increased : JEE Main 2020 (Online) 4th September Evening Slot Physics - Dual Nature of Radiation Question 111 English
A
Slope of the straight line get more steep
B
Graph does not change
C
Straight line shifts to left
D
Straight line shifts to right
2
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Particle A of mass mA = $${m \over 2}$$ moving along the x-axis with velocity v0 collides elastically with another particle B at rest having mass mB = $${m \over 3}$$. If both particles move along the x-axis after the collision, the change $$\Delta $$$$\lambda $$ in de-Broglie wavlength of particle A, in terms of its de-Broglie wavelength ($$\lambda $$0) before collision is :
A
$$\Delta $$$$\lambda $$ = $${5 \over 2}{\lambda _0}$$
B
$$\Delta $$$$\lambda $$ = $${3 \over 2}{\lambda _0}$$
C
$$\Delta $$$$\lambda $$ = 2$$\lambda $$0
D
$$\Delta $$$$\lambda $$ = 4$$\lambda $$0
3
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Given figure shows few data points in a phot electric effect experiment for a certain metal. The minimum energy for ejection of electron from its surface is:
(Plancks constant h = 6.62 × 10–34 J.s) JEE Main 2020 (Online) 4th September Morning Slot Physics - Dual Nature of Radiation Question 112 English
A
2.10 eV
B
2.27 eV
C
2.59 eV
D
1.93 eV
4
JEE Main 2020 (Online) 3rd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Two sources of light emit X-rays of wavelength 1 nm and visible light of wavelength 500 nm, respectively. Both the sources emit light of the same power 200 W. The ratio of the number density of photons of X-rays to the number density of photons of the visible light of the given wavelengths is :
A
$${1 \over {500}}$$
B
500
C
250
D
$${1 \over {250}}$$
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