List of top Physics Questions on Electrostatics asked in MHT CET

An uniformly charged thin spherical shell of radius 'R' has uniform surface charge density '\(σ\)'. It is made of two hemispherical identical shells held together by pressing them with force 'F' as shown. F is proportional to
[\(ε_0\) = permittivity of free space]

A particle of mass 'm' and charge 'q', initially at rest, is accelerated by a uniform electric field 'E' through a distance 'D' and is then allowed to approach a fixed static charge 'Q' of the same sign. The distance of the closest approach of the charge q is
[ \(ε_0\) = permittivity of free space ]

Three point charges Q, \(+2q\) and \(+q\) are placed at the vertices of a right-angled isosceles triangle of length \(\sqrt{2}a\) as shown in figure. The net electrostatic potential energy of the configuration is zero, if Q is equal to

Two spherical hollow spheres of radii '\(R_1\)' and '\(R_2\)' are charged with same charge. Let '\(σ_1\)' and '\(σ_2\)' are their respective charge densities, then the ratio \(σ_1\) to \(σ_2\) is

Two metal sphere of radius \(R\) and \(3R\) have same surface charge density \(σ\). If they are brought in contact and then separated, the surface charge density on smaller and bigger sphere becomes \(σ_1\) and \(σ_2\), respectively. The ratio \(\frac{σ_1}{σ_2}\) is.

Two cells of e.m.f.s $E_1$ and $E_2$ ($E_1>E_2$) are connected as shown in figure. When the potentiometer is connected between A and B, the balancing length of the potentiometer wire is 3.60 m. On connecting the potentiometer between A and C, the balancing length is 0.90 m. The ratio $E_1/E_2$ is

Select the correct statement.

A conducting sphere of radius ' $\text{R}$ ' is given a charge ' $Q$ ' uniformly. The electric field and the electric potential at the centre of the sphere are respectively [ $\varepsilon_0 =$ permittivity of free space]}

The scale of a galvanometer is divided into 160 equal divisions. The galvanometer shows full scale deflection of \(16\text{ mA}\) and maximum voltage is \(80\text{ mV}\) . Now the range is changed so that galvanometer reads \(160\text{ V}\) . The required resistance to be connected is

If only \(5%\) of the total current is to be passed through galvanometer of resistance \(\text{G}\) , then the resistance of the shunt will be

In an isobaric process of an ideal gas, the ratio of heat supplied and work done by the system $\left(\frac{\text{Q}}{\text{W}}\right)$ is $\left[\frac{\text{C}_{\text{P}}}{\text{C}_{\text{V}}} = \gamma\right]$.

When cell of e.m.f. ' \( E_1 \) ' is connected to potentiometer wire, the balancing length is ' \( l_1 \) '. Another cell of e.m.f. ' \( E_2 \) ' (\( E_1>E_2 \)) is connected so that two cells oppose each other, the balancing length is ' \( l_2 \) '. The ratio \( E_1 : E_2 \) is

A hollow charged metal sphere has a radius ' \(r\) '. If the potential difference between its surface and a point at a distance ' \(3r\) ' from the centre is ' \(v\) ', then the electric field intensity at a distance ' \(3r\) ' is

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

A hollow charged metal sphere has a radius ' \(r\) '. If the potential difference between its surface and a point at a distance ' \(3r\) ' from the centre is ' \(v\) ', then the electric field intensity at a distance ' \(3r\) ' is