AP EAPCET 2024 - 22th May Evening Shift | Heat and Thermodynamics Question 1 | Physics

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 $T_1: T_2$

$1: 3$

$2: 3$

$3: 4$

$2: 1$

AP EAPCET 2024 - 22th May Evening Shift

MCQ (Single Correct Answer)

-0

When 80 J of heat is absorbed by a monoatomic gas, its volume increases by $16 \times 10^{-5} \mathrm{~m}^3$. The pressure of the gas is

$2 \times 10^5 \mathrm{Nm}^{-2}$

$4 \times 10^5 \mathrm{Nm}^{-2}$

$6 \times 10^5 \mathrm{Nm}^{-2}$

$5 \times 10^5 \mathrm{Nm}^{-2}$

AP EAPCET 2024 - 22th May Evening Shift

MCQ (Single Correct Answer)

-0

The efficiency of a Carnot heat engine is $25 \%$ and the temperature of its source is $127^{\circ} \mathrm{C}$. Without changing the temperature of the source, if absolute temperature of the sink is decreased by $10 \%$, the efficiency of the engine is

$27.5 \%$

$17.5 \%$

$32.5 \%$

$22.5 \%$

AP EAPCET Subjects