MHT CET 2023 13th May Morning Shift | Heat and Thermodynamics Question 24 | Physics

The temperature gradient in a rod of length $$75 \mathrm{~cm}$$ is $$40^{\circ} \mathrm{C} / \mathrm{m}$$. If the temperature of cooler end of the rod is $$10^{\circ} \mathrm{C}$$, then the temperature of hotter end is

$$50^{\circ} \mathrm{C}$$

$$40^{\circ} \mathrm{C}$$

$$35^{\circ} \mathrm{C}$$

$$25^{\circ} \mathrm{C}$$

MHT CET 2023 12th May Evening Shift

MCQ (Single Correct Answer)

-0

A black body radiates maximum energy at wavelength '$$\lambda$$' and its emissive power is '$$E$$'. Now due to a change in temperature of that body, it radiates maximum energy at wavelength $$\frac{\lambda}{3}$$. At that temperature emissive power is

$$16: 1$$

$$256: 1$$

$$81: 1$$

$$128: 1$$

MHT CET 2023 12th May Evening Shift

MCQ (Single Correct Answer)

-0

For polyatomic gases, the ratio of molar specific heat at constant pressure to constant volume is ( $$\mathrm{f}=$$ degrees of freedom)

$$\frac{2+\mathrm{f}}{3+\mathrm{f}}$$

$$\frac{3+\mathrm{f}}{2+\mathrm{f}}$$

$$\frac{3+\mathrm{f}}{4+\mathrm{f}}$$

$$\frac{4+\mathrm{f}}{3+\mathrm{f}}$$

MHT CET 2023 12th May Evening Shift

MCQ (Single Correct Answer)

-0

Select the WRONG statement from the following. For an isothermal process

Energy exchanged is used to do work

Perfect thermal equilibrium with environment

Equation of state PV is not constant.

No change internal energy.

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