MHT CET 2026 19th April Morning Shift | Heat and Thermodynamics Question 22 | Physics

The kinetic energy of an ideal gas is $E_0$ at $27^\circ\text{C}$. When the temperature is increased to $177^\circ\text{C}$, then kinetic energy will be

$E_0 / 2$

$2E_0 / 3$

$3E_0 / 2$

$2E_0$

MHT CET 2025 5th May Evening Shift

MCQ (Single Correct Answer)

-0

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

$\frac{3}{2} \lambda_{\mathrm{m}}$

$\frac{16}{81} \lambda_m$

$\frac{81}{16} \lambda_m$

$\frac{2}{3} \lambda_m$

MHT CET 2025 5th May Evening Shift

MCQ (Single Correct Answer)

-0

The relation between efficiency $(\eta)$ of Carnot engine and coefficient of performance $\left(\eta_1\right)$ of refrigerator is

$\eta=\frac{1}{1+\eta_1}$

$\eta=\frac{1}{1-\eta_1}$

$\quad \eta=\frac{\eta_1}{1-\eta_1}$

$\eta=\frac{1+\eta_1}{\eta_1}$

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