1
KCET 2025
MCQ (Single Correct Answer)
+1
-0

If $r_p, v_p, L_p$ and $r_a, v_a, L_a$ are radii, velocities and angular momenta of a planet at perihelion and aphelion of its elliptical orbit around the Sun respectively, then

A
$r_p>r_a, v_p>v_a, L_a>L_p$
B
$r_p < r_a, v_p > v_a, L_a=L_p$
C
$\mathrm{r}_{\mathrm{p}} > \mathrm{r}_{\mathrm{a}}, \mathrm{v}_{\mathrm{p}} < \mathrm{v}_{\mathrm{a}}, \mathrm{L}_{\mathrm{a}}=\mathrm{L}_{\mathrm{p}}$
D
$\mathrm{r}_{\mathrm{p}} < \mathrm{r}_{\mathrm{a}}, \mathrm{v}_{\mathrm{p}} < \mathrm{v}_{\mathrm{a}}, \mathrm{L}_{\mathrm{a}} < \mathrm{L}_{\mathrm{p}}$
2
KCET 2025
MCQ (Single Correct Answer)
+1
-0

The total energy of a satellite in a circular orbit at a distance $(R+h)$ from the centre of the Earth varies as [ $R$ is the radius of the Earth and $h$ is the height of the oribit from Earth's surface]

A
$-\frac{1}{(\mathrm{R}+\mathrm{h})}$
B
$\frac{1}{(R+h)^2}$
C
$-\frac{1}{(R+h)^2}$
D
$\frac{1}{(\mathrm{R}+\mathrm{h})}$
3
KCET 2025
MCQ (Single Correct Answer)
+1
-0

Two wires A and B are made of same material. Their diameters are in the ratio of $1: 2$ and lengths are in the ratio of $1: 3$. If they are stretched by the same force, then increase in their lengths will be in the ratio of

A
$3: 4$
B
$2: 3$
C
$3: 2$
D
$4: 3$
4
KCET 2025
MCQ (Single Correct Answer)
+1
-0

A horizontal pipe carries water in a streamlined flow. At a point along the pipe, where the cross-sectional area is $10 \mathrm{~cm}^{-2}$, the velocity of water is $1 \mathrm{~ms}^{-1}$ and the pressure is 2000 Pa . What is the pressure of water at another point where the cross-sectional area is $5 \mathrm{~cm}^2$ ?

[Density of water $=1000 \mathrm{kgm}^{-3}$ ]

A
300 Pa
B
400 Pa
C
500 Pa
D
200 Pa
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