MHT CET 2021 20th September Morning Shift | Electrostatics Question 38 | Physics

A uniformly charged half ring of a radius ' $R$ ' has linear charge density '$$\sigma$$'. The electric potential at the centre of the half ring is ( $$\epsilon_0=$$ permittivity of free space)

$$\frac{\sigma}{6 \epsilon_0}$$

$$\frac{\sigma}{2 \epsilon_0}$$

$$\frac{\sigma}{\epsilon_0}$$

$$\frac{\sigma}{4 \epsilon_0}$$

MHT CET 2021 20th September Morning Shift

MCQ (Single Correct Answer)

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A spherical conducting shell of inner radius 'r$$_1$$' and outer radius 'r$$_2$$' has a charge 'Q'. A charge $$-$$q is placed at the centre of the shell. The surface charge density on the inner and outer surface of the shell will be

MHT CET 2021 20th September Morning Shift Physics - Electrostatics Question 40 English

$$\frac{q}{4 \pi r_1^2}$$ and $$\frac{\mathrm{Q}-\mathrm{q}}{4 \pi \mathrm{r}_2^2}$$

$$\frac{q}{4 \pi r_1^2}$$ and $$\frac{Q}{4 \pi r_2^2}$$

$$\frac{-q}{4 \pi r_1^2}$$ and $$\frac{Q+q}{4 \pi r_2^2}$$

zero and $$\frac{\mathrm{Q}-\mathrm{q}}{4 \pi \mathrm{r}_2^2}$$

MHT CET 2021 20th September Morning Shift

MCQ (Single Correct Answer)

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A charge of magnitude '2e' and mass '4m' is moving in an electric field $$\overrightarrow E $$. The acceleration imparted to the above charge is

$$\mathrm{\frac{2m}{3Ee}}$$

$$\mathrm{\frac{Ee}{2m}}$$

$$\mathrm{\frac{2Ee}{3m}}$$

$$\mathrm{\frac{3m}{2Ee}}$$

MHT CET 2020 16th October Morning Shift

MCQ (Single Correct Answer)

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Surface density of charge on a charged conducting sphere of radius $$R$$ in terms of electric field intensity $$E$$ at a distance $$r$$ in free space is ($$r>R, \varepsilon_0=$$ permittivity of free space)

$$\varepsilon_0 E\left(\frac{R}{r}\right)^2$$

$$\varepsilon_0 E \frac{R}{r}$$

$$\varepsilon_0 E\left(\frac{r}{R}\right)^2$$

$$\varepsilon_0 E \frac{r}{R}$$

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