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

Two spherical conductors of capacities $$3 \mu \mathrm{F}$$ and $$2 \mu \mathrm{F}$$ are charged to same potential having radii $$3 \mathrm{~cm}$$ and $$2 \mathrm{~cm}$$ respectively. If '$$\sigma_1$$' and '$$\sigma_2$$' represent surface density of charge on respective conductors then $$\frac{\sigma_1}{\sigma_2}$$ is

A
$$\frac{1}{3}$$
B
$$\frac{1}{2}$$
C
$$\frac{2}{3}$$
D
$$\frac{3}{4}$$
2
MHT CET 2023 11th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A circular arc of radius '$$r$$' carrying current '$$\mathrm{I}$$' subtends an angle $$\frac{\pi}{16}$$ at its centre. The radius of a metal wire is uniform. The magnetic induction at the centre of circular arc is $$\left[\mu_0=\right.$$ permeability of free space]

A
$$\frac{\mu_0 \mathrm{I}}{32 \mathrm{r}}$$
B
$$\frac{\mu_0 \mathrm{I}}{16 \mathrm{r}}$$
C
$$\frac{\mu_0 \mathrm{I}}{64 \mathrm{r}}$$
D
$$\frac{\mu_0 \mathrm{I}}{8 \mathrm{r}}$$
3
MHT CET 2023 11th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A sound of frequency $$480 \mathrm{~Hz}$$ is emitted from the stringed instrument. The velocity of sound in air is $$320 \mathrm{~m} / \mathrm{s}$$. After completing 180 vibrations, the distance covered by a wave is

A
60 m
B
90 m
C
120 m
D
180 m
4
MHT CET 2023 11th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A sonometer wire '$$A$$' of diameter '$$\mathrm{d}$$' under tension '$$T$$' having density '$$\rho_1$$' vibrates with fundamental frequency '$$n$$'. If we use another wire '$$B$$' which vibrates with same frequency under tension '$$2 \mathrm{~T}$$' and diameter '$$2 \mathrm{D}$$' then density '$$\rho_2$$' of wire '$$B$$' will be

A
$$\rho_2=2 \rho_1$$
B
$$\rho_2=\rho_1$$
C
$$\rho_2=\frac{\rho_1}{2}$$
D
$$\rho_2=\frac{\rho_1}{4}$$
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