1
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Find the value of '$$n$$' in the given equation $$P=\rho^n v^2$$ where '$$P$$' is the pressure, '$$\rho$$' density and '$$v$$' velocity.

A
$$\mathrm{n}=\frac{1}{2}$$
B
$$\mathrm{n}=1$$
C
$$\mathrm{n}=3$$
D
$$\mathrm{n}=2$$
2
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

A stone of mass $$2 \mathrm{~kg}$$ is hung from the ceiling of the room using two strings. If the strings make an angle $$60^{\circ}$$ and $$30^{\circ}$$ respectively with the horizontal surface of the roof then the tension on the longer string is : $$g=10 \mathrm{~ms}^{-2}$$

A
$$\frac{\sqrt{3}}{2} \mathrm{~N}$$
B
$$10 \sqrt{3} \mathrm{~N}$$
C
$$10 \mathrm{~N}$$
D
$$\sqrt{3} \mathrm{~N}$$
3
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

A parallel plate capacitor is filled by a dielectric whose relative permittivity varies with the applied voltage (U) as $$\epsilon=2 U$$. A similar capacitor with no dielectric is charged to $$U_0=78 \mathrm{~V}$$. It is then connected to the uncharged capacitor with the dielectric. Find the final voltage on the capacitors.

A
6V
B
8V
C
2V
D
4V
4
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the ratio of lengths, radii and Young's Moduli of steel and brass wires in the figure are $$\mathrm{a}, \mathrm{b}$$ and $$\mathrm{c}$$ respectively, then the corresponding ratio of increase in their lengths would be

COMEDK 2024 Morning Shift Physics - Elasticity Question 2 English

A
$$ \frac{a}{3 b^2 c} $$
B
$$ \frac{3 a}{2 b^2 c} $$
C
$$ \frac{2 a}{3 b^2 c} $$
D
$$ \frac{2 \mathrm{ab}^2}{c} $$
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