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1
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The SI unit and dimensions of Stefan's constant $\sigma$ in case of Stefan's law of radiation is

A
$\frac{\mathrm{J}}{\mathrm{m}^3 \mathrm{~s}^4}$, $\left[M^1 L^0 T^{-3} K^{-4}\right]$
B
$\frac{\mathrm{J}}{\mathrm{m}^2 \mathrm{~s}^4 \mathrm{~K}}$, $\left[M^1 L^0 T^{-3} K^3\right]$
C
$\frac{\mathrm{J}}{\mathrm{m}^3 \mathrm{~s} \mathrm{~K}^4},\left[\mathrm{M}^{1} \mathrm{L}^0 \mathrm{~T}^{-3} \mathrm{~K}^4\right]$
D
$\frac{\mathrm{J}}{\mathrm{m}^2 \mathrm{~s} \mathrm{~K}^4},\left[\mathrm{M}^1 \mathrm{~L}^0 \mathrm{~T}^{-3} \mathrm{~K}^{-4}\right]$
2
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The rms speed of oxygen molecule in a gas is $u$, If the temperature is doubled and the molecules dissociates into two atoms, the rms speed will be

A
4u
B
u
C
2u
D
u$\sqrt2$
3
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The equation of state for 2 g of oxygen at a pressure ' $P$ ' and temperature ' $T$, when occupying a volume ' $V$ ' will be

A
$p V=16 R T$
B
$p V=R T$
C
$p V=\frac{1}{16} R T$
D
$p V=2 R T$
4
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The maximum wavelength of radiation emitted by a star is 289.8 nm . Then intensity of radiation for the star is (Given : Stefan's constant $=5.67 \times 10^{-8} \mathrm{Wm}^{-2} \mathrm{~K}^{-4}$, Wien's constant, $b=2898 \mu \mathrm{mK}$ )

A
$5.67 \times 10^{-12} \mathrm{Wm}^{-2}$
B
$10.67 \times 10^{14} \mathrm{Wm}^{-2}$
C
$5.67 \times 10^8 \mathrm{Wm}^{-2}$
D
$10.67 \times 10^7 \mathrm{Wm}^{-2}$
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