1
MHT CET 2023 10th May Morning Shift
+1
-0

Maximum kinetic energy of photon is '$$E$$' when wavelength of incident radiation is '$$\lambda$$'. If wavelength of incident radiations is reduced to $$\frac{\lambda}{3}$$ then energy of photon becomes four times. Then work function of the metal is

A
$$\frac{3 h c}{\lambda}$$
B
$$\frac{\mathrm{hc}}{3 \lambda}$$
C
$$\frac{h c}{\lambda}$$
D
$$\frac{\mathrm{hc}}{2 \lambda}$$
2
MHT CET 2023 9th May Evening Shift
+1
-0

When photons of energies twice and thrice the work function of a metal are incident on the metal surface one after other, the maximum velocities of the photoelectrons emitted in the two cases are $$\mathrm{v}_1$$ and $$\mathrm{v}_2$$ respectively. The ratio $$\mathrm{v}_1: \mathrm{v}_2$$ is

A
$$\sqrt{2}: 1$$
B
$$\sqrt{3}: 1$$
C
$$\sqrt{3}: \sqrt{2}$$
D
$$1: \sqrt{2}$$
3
MHT CET 2023 9th May Evening Shift
+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
$$\frac{4 v}{3}$$
4
MHT CET 2023 9th May Morning Shift
+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
$$\frac{x v_2-v_1}{x-1}$$
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