1
MHT CET 2023 12th May Morning Shift
+1
-0

A black sphere has radius '$$R$$' whose rate of radiation is '$$E$$' at temperature '$$T$$'. If radius is made $$R / 3$$ and temperature '$$3 T$$', the rate of radiation will be

A
E
B
3E
C
6E
D
9E
2
MHT CET 2023 12th May Morning Shift
+1
-0

A gas at normal temperature is suddenly compressed to one-fourth of its original volume. If $$\frac{\mathrm{C}_{\mathrm{p}}}{\mathrm{C}_{\mathrm{v}}}=\gamma=1.5$$, then the increase in its temperature is

A
273 K
B
373 K
C
473 K
D
573 K
3
MHT CET 2023 12th May Morning Shift
+1
-0

About black body radiation, which of the following is the wrong statement?

A
For all wavelengths, intensity is same.
B
For shorter wavelengths, intensity is more.
C
For longer wavelengths, intensity is less.
D
All wavelengths are emitted by a black body.
4
MHT CET 2023 11th May Evening Shift
+1
-0

For a gas, $$\frac{\mathrm{R}}{\mathrm{C}_{\mathrm{v}}}=0 \cdot 4$$, where $$\mathrm{R}$$ is universal gas constant and $$\mathrm{C}_{\mathrm{v}}$$ is molar specific heat at constant volume. The gas is made up of molecules which are

A
rigid diatomic
B
monoatomic
C
non-rigid diatomic
D
polyatomic
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