1
MHT CET 2023 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

When a certain metal surface is illuminated with light of frequency $$v$$, the stopping potential for photoelectric current is $$\mathrm{V}_0$$. When the same surface is illuminated by light of frequency $$\frac{v}{2}$$, the stopping potential is $$\frac{\mathrm{V}_0}{4}$$, the threshold frequency of photoelectric emission is

A
$$\frac{v}{6}$$
B
$$\frac{v}{3}$$
C
$$\frac{2 v}{3}$$
D
$$\frac{4 v}{3}$$
2
MHT CET 2023 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

From a metallic surface photoelectric emission is observed for frequencies $$v_1$$ and $$v_2\left(v_1 > v_2\right)$$ of the incident light. The maximum values of the kinetic energy of the photoelectrons emitted in the two cases are in the ratio $$1: \mathrm{x}$$. Hence the threshold frequency of the metallic surface is

A
$$\frac{v_1-v_2}{x}$$
B
$$\frac{v_1-v_2}{x-1}$$
C
$$\frac{x v_1-v_2}{x-1}$$
D
$$\frac{x v_2-v_1}{x-1}$$
3
MHT CET 2021 21th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

The wave number of the last line of the Balmer series in the hydrogen spectrum will be $$\left(\right.$$ Rydberg's cons $$\left.\tan t, R=\frac{10^7}{\mathrm{~m}}\right)$$

A
$$16 \times 10^4 \mathrm{~m}^{-1}$$
B
$$8 \times 10^5 \mathrm{~m}^{-1}$$
C
$$36 \times 10^7 \mathrm{~m}^{-1}$$
D
$$25 \times 10^5 \mathrm{~m}^{-1}$$
4
MHT CET 2021 21th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Photoemission from metal surface takes place for frequencies '$$v_1$$' and '$$v_2$$' of incident rays $$\left(v_1>v_2\right)$$. Maximum kinetic energy of photoelectrons emitted is in the ratio $$1: \mathrm{K}$$. The threshold frequency of metallic surface is

A
$$\frac{K v_2-v_1}{K-1}$$
B
$$\frac{v_1-v_2}{\mathrm{~K}-1}$$
C
$$\frac{v_2-v_1}{K}$$
D
$$\frac{K v_1-v_2}{K-1}$$
MHT CET Subjects
EXAM MAP
Joint Entrance Examination
JEE MainJEE AdvancedWB JEEBITSATMHT CET
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN