1
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two identical capacitors have the same capacitance '$$C$$'. One of them is charged to a potential $$V_1$$ and the other to $$V_2$$. The negative ends of the capacitors are connected together. When the positive ends are also connected, the decrease in energy of the combined system is

A
$$\frac{1}{4} \mathrm{C}\left(\mathrm{V}_1^2-\mathrm{V}_2^2\right)$$
B
$$\frac{1}{4} \mathrm{C}\left(\mathrm{V}_1^2+\mathrm{V}_2^2\right)$$
C
$$\frac{1}{4} \mathrm{C}\left(\mathrm{V}_1-\mathrm{V}_2\right)^2$$
D
$$\frac{1}{4} \mathrm{C}\left(\mathrm{V}_1+\mathrm{V}_2\right)^2$$
2
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A transverse wave $$\mathrm{Y}=2 \sin (0.01 \mathrm{x}+30 \mathrm{t})$$ moves on a stretched string from one end to another end in 0.5 second. If $$x$$ and $$y$$ are in $$\mathrm{cm}$$ and $$t$$ in second, then the length of the string is

A
5 m
B
10 m
C
15 m
D
20 m
3
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A body of density '$$\rho$$' is dropped from rest at a height '$$h$$' into a lake of density '$$\sigma' (\sigma>\rho)$$. The maximum depth to which the body sinks before returning to float on the surface is (neglect air dissipative forces)

A
$$\frac{\mathrm{h} \rho}{(\sigma-\rho)}$$
B
$$\frac{h \rho}{(\sigma+\rho)}$$
C
$$\frac{\mathrm{h} \rho}{(\rho-\sigma)}$$
D
$$\frac{2 \mathrm{~h} \rho}{(\sigma-\rho)}$$
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