1
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two spherical black bodies of radii '$$r_1$$' and '$$r_2$$' at temperature '$$\mathrm{T}_1$$' and '$$\mathrm{T}_2$$' respectively radiate power in the ratio $$1: 2$$ Then $$r_1: r_2$$ is

A
$$\frac{1}{2}\left(\frac{\mathrm{T}_2}{\mathrm{~T}_1}\right)^4$$
B
$$\frac{1}{\sqrt{2}}\left(\frac{\mathrm{T}_2}{\mathrm{~T}_1}\right)^2$$
C
$$2\left(\frac{\mathrm{T}_1}{\mathrm{~T}_2}\right)^4$$
D
$$2\left(\frac{T_1}{T_2}\right)^2$$
2
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

For a particle executing S.H.M., its potential energy is 8 times its kinetic energy at certain displacement '$$x$$' from the mean position. If '$$A$$' is the amplitude of S.H.M the value of '$$x$$' is

A
$$\frac{\mathrm{A} \sqrt{2}}{3}$$
B
$$\mathrm{A} \sqrt{3}$$
C
$$\frac{2 \sqrt{2} \mathrm{~A}}{3}$$
D
$$\frac{\mathrm{A}}{\sqrt{2}}$$
3
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The maximum kinetic energies of photoelectrons emitted are $$\mathrm{K}_1$$ and $$\mathrm{K}_2$$ when lights of wavelengths $$\lambda_1$$ and $$\lambda_2$$ are incident on a metallic surface. If $$\lambda_1=3 \lambda_2$$ then

A
$$\mathrm{K}_1=\frac{\mathrm{K}_2}{3}$$
B
$$\mathrm{K}_1<\frac{\mathrm{K}_2}{3}$$
C
$$\mathrm{K}_1=3 \mathrm{K}_2$$
D
$$3 \mathrm{K}_1=2 \mathrm{K}_2$$
4
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A particle moves along a circular path with decreasing speed. Hence

A
its resultant acceleration is towards the centre.
B
it moves in a spiral path with decreasing radius.
C
the direction of angular momentum remains constant.
D
its angular momentum remains constant
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