MHT CET 2025 25th April Evening Shift | Heat and Thermodynamics Question 10 | Physics

The volume of a metal sphere increases by $0.33 \%$ when its temperature is raised by $50^{\circ} \mathrm{C}$. The coefficient of linear expansion of the metal is

$2.2 \times 10^{-5} /{ }^{\circ} \mathrm{C}$

$6.6 \times 10^{-5} /{ }^{\circ} \mathrm{C}$

$13.2 \times 10^{-5} /{ }^{\circ} \mathrm{C}$

$19.8 \times 10^{-5} /{ }^{\circ} \mathrm{C}$

MHT CET 2025 25th April Evening Shift

MCQ (Single Correct Answer)

-0

Heat supplied $d Q=$ increased in internal energy dU is true for

isothermal process.

adiabatic process.

isobaric process.

isochoric process.

MHT CET 2025 25th April Evening Shift

MCQ (Single Correct Answer)

-0

A black body emits radiation of maximum intensity at wavelength ' $\lambda$ ' at temperature T K. Its corresponding wavelength at temperature 1.5 T K will be

$\frac{2 \lambda}{3}$

$\frac{4 \lambda}{3}$

$\frac{16 \lambda}{81}$

$\frac{81 \lambda}{16}$

MHT CET 2025 25th April Morning Shift

MCQ (Single Correct Answer)

-0

A rectangular black body of temperature $127^{\circ} \mathrm{C}$ has surface area $4 \mathrm{~cm} \times 2 \mathrm{~cm}$ and rate of radiation is E . If its temperature is increased by $400^{\circ} \mathrm{C}$ and surface area is reduced to half of the initial value then the rate of radiation is

4 E

2 E

16 E

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