AP EAPCET 2024 - 23th May Morning Shift | Heat and Thermodynamics Question 3 | Physics

If the ratio of the absolute temperature of the sink and source of a Carnot engine is changed from $2: 3$ to $3: 4$, the efficiency of the engine change by

$25 \%$

$40 \%$

$50 \%$

$15 \%$

AP EAPCET 2024 - 23th May Morning Shift

MCQ (Single Correct Answer)

-0

The ratio of the molar specific heat capacities of monoatomic and diatomic gases at constant pressure is

$1: 7$

$5: 7$

$3: 7$

$2: 7$

AP EAPCET 2024 - 22th May Evening Shift

MCQ (Single Correct Answer)

-0

Water of mass $m$ at $30^{\circ} \mathrm{C}$ is mixed with with 5 g of ice at $-20^{\circ} \mathrm{C}$. If the resultant temperature of the mixture is $6^{\circ} \mathrm{C}$, then the value of $m$ is (specific heat capacity of ice $=0.5 \mathrm{cal} \mathrm{g}^{-10} \mathrm{C}^{-1}$, specific heat capacity of water $=1$ calg ${ }^{-1}{ }^{\circ} \mathrm{C}^{-1}$ and latent heat of fusion of ice $=80 \mathrm{cal} \mathrm{g}^{-1}$ )

48 g

20 g

24 g

40 g

AP EAPCET 2024 - 22th May Evening Shift

MCQ (Single Correct Answer)

-0

Two ideal gases $A$ and $B$ of same number of moles expand at constant temperatures $T_1$ and $T_2$ respectively such that the pressure of gas $A$ decreases by $50 \%$ and the pressure of gas $B$ decreases by $75 \%$. If the work done by both the gases is same, then $T_1: T_2$

$1: 3$

$2: 3$

$3: 4$

$2: 1$

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