1
KCET 2023
MCQ (Single Correct Answer)
+1
-0

A closed water tank has cross-sectional area $$A$$. It has a small hole at a depth of $$h$$ from the free surface of water. The radius of the hole is $$r$$ so that $$r \ll \sqrt{\frac{A}{\pi}}$$. If $$p_o$$ is the pressure inside the tank above water level and $$p_a$$ is the atmospheric pressure, the rate of flow of the water coming out of the hole is ( $$\rho$$ is density of water)

KCET 2023 Physics - Fluid Mechanics Question 10 English

A
$$\pi r^2 \sqrt{2 g h}$$
B
$$\pi r^2 \sqrt{2 g h+\frac{2\left(p_0-p_a\right)}{\rho}}$$
C
$$\pi r^2 \sqrt{2 g H}$$
D
$$\pi r^2 \sqrt{g h+\frac{2\left(p_0-p_a\right)}{\rho}}$$
2
KCET 2023
MCQ (Single Correct Answer)
+1
-0

$$100 \mathrm{~g}$$ of ice at $$0^{\circ} \mathrm{C}$$ is mixed with $$100 \mathrm{~g}$$ of water at $$100^{\circ} \mathrm{C}$$. The final temperature of the mixture is

[Take, $$L_f=3.36 \times 10^5 \mathrm{~J} \mathrm{~kg}^{-1}$$ and $$S_w=4.2 \times 10^3 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1} \text { ] }$$

A
$$40^{\circ} \mathrm{C}$$
B
$$10^{\circ} \mathrm{C}$$
C
$$50^{\circ} \mathrm{C}$$
D
$$1{ }^{\circ} \mathrm{C}$$
3
KCET 2023
MCQ (Single Correct Answer)
+1
-0

The $$p$$-$$V$$ diagram of a Carnot's engine is shown in the graph below. The engine uses 1 mole of an ideal gas as working substance. From the graph, the area enclosed by the $$p$$-$$V$$ diagram is [The heat supplied to the gas is 8000 J]

KCET 2023 Physics - Heat and Thermodynamics Question 22 English

A
1200 J
B
2000 J
C
3000 J
D
1000 J
4
KCET 2023
MCQ (Single Correct Answer)
+1
-0

When a planet revolves around the Sun, in general, for the planet

A
linear momentum and linear velocity are constant.
B
linear momentum and areal velocity are constant.
C
kinetic and potential energy of the planet are constant.
D
angular momentum about the Sun and areal velocity of the planet are constant.
EXAM MAP