AP EAPCET 2024 - 22th May Morning Shift | Heat and Thermodynamics Question 58 | Physics

A metal ball of mass 100 g at $20^{\circ} \mathrm{C}$ is dropped in 200 g of water at $80^{\circ} \mathrm{C}$. If the resultant temperature is $70^{\circ} \mathrm{C}$, then the ratio of specific heat of the metal to that of water is

$\frac{5}{2}$

$\frac{1}{2}$

$\frac{2}{5}$

$\frac{2}{1}$

AP EAPCET 2024 - 22th May Morning Shift

MCQ (Single Correct Answer)

-0

The efficiency of a heat engine that works between the temperatures where Celsius-Fahrenheit scales coincides and Kelvin-Fahrenheit scales coincides is (approximately)

$45 \%$

$35 \%$

$60 \%$

$50 \%$

AP EAPCET 2024 - 22th May Morning Shift

MCQ (Single Correct Answer)

-0

Initially the pressure of 1 mole of an ideal gas is $10^5 \mathrm{Nm}^{-2}$ and its volume is 16 L . When it is adiabatically compressed, its final volume is 2 L . Work-done on the gas is

$\left[\right.$ molar specific heat at constant volume $\left.=\frac{3}{2} R\right]$

72 kJ

7.2 kJ

720 kJ

360 kJ

AP EAPCET 2024 - 22th May Morning Shift

MCQ (Single Correct Answer)

-0

An ideal gas is taken around $A B C A$ as shown in the $P^{\prime \prime}$ diagram. The work done during the cycle is

AP EAPCET 2024 - 22th May Morning Shift Physics - Heat and Thermodynamics Question 58 English

$2 \rho V$

$p V$

$\frac{1}{2} p V$

Zero

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