Electric Field

Two point charges $q$ and $2q$ are placed some distance apart. If the electric field at the location of $q$ be $E$, then that at the location of $2q$ will be

What is test charge and why it is made neglibile small while testing the effect of the source charge?

Electric field an electric property associated with each point in space when charge is present in any form.

What are the significance of electrical field lines?

A small metal ball is suspended in an uniform electric field with the help of an insulated thread. If a high energy $\mathrm{X}$-ray beam falls on the ball, then the ball

An electrostatic field line leaves at an angle $\alpha$ from point charge $q_1$ and connects with point charge $-q_2$ at an angle $\beta$($q_1$and $q_2$ are positive) see figure below. If $q_2=\frac{3}{2}{q}_1$ and $\alpha =30°,$ then

Two masses $M_1$ and $M_2$ carry positive charges $Q_1$ and $Q_2,$ respectively. They are dropped to the floor in a laboratory set up from the same height, where there is a constant electric field vertically upwards. $M_1$ hits the floor before $M_2$. Then,

Three particles of charges $1\times {10}^{-8} \mathrm{C}, 8.0\times {10}^{-8} \mathrm{C}$ and $27\times {10}^{-8} \mathrm{C}$ are kept fixed on the $x$-axis at point $x=10 \mathrm{cm}, 20 \mathrm{cm}$ and $30 \mathrm{cm}$ respectively. The magnitude of the electric force acting on a $1 \mathrm{C}$ charge placed at $x=0.$ (Assume $\frac{1}{4\pi {\epsilon }_0}=9\times {10}^9 \mathrm{N} {\mathrm{C}}^{-2} {\mathrm{m}}^2$)

Two fixed point charges $+4q$ and $+q$ units are separated by a distance of $a$. The distance, where the resultant electric field intensity is zero, measured from charge $+4q$ is

The change in force experienced by a static charge due to an accelerated charge is not instantaneous. Explain.

Which one of the following statement is not correct about electric field?

A small sphere of mass $2\mathrm{ g}$ having charge $5\mathrm{ }\mathrm{\mu C}$ is suspended using an insulated string as given in figure. Find the angle made by string with vertical if it is placed in electric field of magnitude $2000$ $\mathrm{V} {\mathrm{m}}^{-1}$ towards right

A vanishingly small point charge $q$ experiences a force $\overrightarrow{F}$ due to a source charge present in space. The ratio $\frac{\overrightarrow{F}}{q}$ is:

A much higher value of a test charge does not affect:

In order to find the electric field due to a point charge in space, the test charge should be negligibly small? Explain with reason.

What do you mean by a test charge?

How we can determine the electric field due to continuous distribution of charge?

In the figure, four point charges are placed at the four corners of a square of side $2 \mathrm{cm}$. Determine the magnitude and direction of electric field at the centre $\mathrm{O}$ of the square $Q=0.02 \mathrm{\mu C}$.

Equal charges $q$ each, are placed at the vertices $A$ and $B$ of an equilateral triangle. Find the magnitude of the electric field at the vertex $C$.