1
MHT CET 2024 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The frequency ' $v_{\mathrm{m}}$ ' corresponding to which the energy emitted by a black body is maximum may vary with the temperature ' $T$ ' of the body as shown by the curves ' A ', ' B ', ' C ' and ' D ' in the figure. Which one of these represents the correct variation?

MHT CET 2024 2nd May Morning Shift Physics - Heat and Thermodynamics Question 82 English

A
straight line D
B
curve C
C
straight line B
D
curve A
2
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A metal rod cools at the rate of $$4{ }^{\circ} \mathrm{C} / \mathrm{min}$$ whon its temperature is $$90^{\circ} \mathrm{C}$$ and the rate of $$1{ }^{\circ} \mathrm{C} / \mathrm{m}{\text {in }}$$ when its temperature is $$30^{\circ} \mathrm{C}$$. The temperature of the surrounding is

A
$$20^{\circ} \mathrm{C}$$
B
$$15{ }^{\circ} \mathrm{C}$$
C
$$10^{\circ} \mathrm{C}$$
D
$$5^{\circ} \mathrm{C}$$
3
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The molecular mass of a gas having r.m.s. speed four times as that of another gas having molecular mass 32 is

A
2
B
4
C
16
D
32
4
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

At constant temperature, increasing the pressure of a gas by $$5 \%$$ its volume will decrease by

A
$$5 \%$$
B
$$5.26 \%$$
C
$$4.20 \%$$
D
$$4.70 \%$$
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