1
MHT CET 2021 21th September Morning Shift
+1
-0

A black body has maximum wavelength '$$\lambda_{\mathrm{m}}$$' at temperature $$2000 \mathrm{~K}$$. Its corresponding wavelength at temperature $$3000 \mathrm{~K}$$ will be

A
$$\frac{4 \lambda_m}{9}$$
B
$$\frac{2 \lambda_m}{9}$$
C
$$\frac{3 \lambda_{\mathrm{m}}}{2}$$
D
$$\frac{9}{4} \lambda_{\mathrm{m}}$$
2
MHT CET 2021 21th September Morning Shift
+1
-0

A monoatomic gas at pressure '$$\mathrm{P}$$' having volume '$$\mathrm{V}$$' expands isothermally to a volume $$2 \mathrm{~V}$$ and then adiabatically to a volume $$16 \mathrm{~V}$$. The final pressure of the gas is $$\left(\gamma=\frac{5}{3}\right)$$

A
$$\frac{P}{64}$$
B
$$\frac{\mathrm{P}}{128}$$
C
$$\frac{P}{8}$$
D
$$\frac{\mathrm{P}}{32}$$
3
MHT CET 2021 21th September Morning Shift
+1
-0

A black reactangular surface of area '$$a$$' emits energy '$$\mathrm{E}$$' per second at $$27^{\circ} \mathrm{C}$$. If length and breadth is reduced to $$\left(\frac{1}{3}\right)^{\text {rd }}$$ of initial value and temperature is raised to $$327^{\circ} \mathrm{C}$$ then energy emitted per second becomes

A
$$\frac{16 \mathrm{E}}{9}$$
B
$$\frac{8 \mathrm{E}}{9}$$
C
$$\frac{4 \mathrm{E}}{9}$$
D
$$\frac{12 \mathrm{E}}{9}$$
4
MHT CET 2021 21th September Morning Shift
+1
-0

Find the value of $$-$$197$$^\circ$$C temperature in Kelvin.

A
47 K
B
76 K
C
470 K
D
760 K
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Physics
Mechanics
Optics
Electromagnetism
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
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Algebra
Trigonometry
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Coordinate Geometry
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