List of top Physics Questions on Electric charges and fields asked in TS EAMCET

At a distance of 20 cm from the centre of a charged conducting sphere of radius 10 cm, the electric field due to the sphere is $9000NC^{-1}$ If an electric charge of 3 µC is placed at a distance of 30 cm from the centre of the sphere, then the electrostatic force acting on the charge is}

In an isosceles right angled triangle ABC, the equal sides AB and AC are 10 cm. Charges \(+5\mu C\), \(+20\mu C\) and \(+20\mu C\) are placed at A, B and C respectively. A charge \(+2\mu C\) is placed at the midpoint of BC. The net electrostatic force on it is:

If $\phi_A$ and $\phi_B$ are the electric fluxes leaving and entering a Gaussian surface respectively, then the charge enclosed is:

If three electric charges each of magnitude 20 µC are placed at any three corners of a square of side $\sqrt{2}\,m$, then the net electric field at the centre of the square (in $10^{5}NC^{-1}$) is}

An electron is moving in a stable circular orbit of radius $0.1\text{ m}$ around a thin infinitely long positively charged straight wire. If the orbital velocity of the electron around the wire is $4 \times 10^7\text{ ms}^{-1}$, then the linear charge density of the wire is nearly:

The electrostatic force between two charges kept in air is F. If 30% of the space between the charges is filled with a medium, then the electrostatic force between the charges becomes $\frac{F}{2.56}$. The dielectric constant of the medium is

An alpha particle and a proton are accelerated from rest in a uniform electric field. The ratio of the times taken by proton and alpha particle to attain equal displacements is

Four electric charges 2 µC, Q, 4 µC and 12 µC are placed on x-axis at distances x = 0, 1 cm, 2 cm and 4 cm respectively. If the net force acting on the charge at origin is zero, then Q =

Two point charges $+2\mu C$ and $+8\mu C$ are placed at a distance of 15 cm apart in air. At a point on the line joining these two charges where the net electric field becomes zero, a third charge of $+5\mu C$ is placed. The net electrostatic force acting on $+5\mu C$ charge is

When three particles each having a positive charge $q$ are placed at the three vertices of an equilateral triangle, then the electrostatic force between any two particles is $F$. If a fourth particle of charge $3q$ is placed at the midpoint of one of the sides of the triangle, then the net electrostatic force on the fourth particle due to the remaining three particles is

A proton and an alpha particle enter a uniform electric field perpendicular to the direction of the field. The ratio of distances travelled by the proton and the alpha particle in the direction of the field after a time of $t$ seconds is: