Equipotential Surfaces

Choose the incorrect statement. 

Equipotential surfaces 

If a charge $q$ is moved around a charge $Q$ in circular path of radius $r$ with $Q$ as centre then potential difference between any two points on circumference is

A diverging electron beam enters a region of varying potentials (intersection of equi-spaced equipotential plane surfaces with the plane of paper is shown with their potentials mentioned in the figure). If before entering this region $x$ and $y$ components of velocity of electrons are $3\sqrt{\frac{2eV}{m}}$ and $\sqrt{\frac{eV}{m}}$ respectively where $m$ is mass of an electron and $e$ is electronic charge, then

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A non-uniform electric field is represented by equipotential lines. What is the direction of the electric field line at point $A$?

Equipotential spheres are drawn round a point charge. As we move away from the charge, will the spacing between two spheres having a constant potential difference decrease, increase or remain constant.

Referring to the spherical equipotential lines in Fig. $\left(\mathrm{a}\right)$ find

(a) $\overrightarrow{E}=f\left(r\right)$, (b) $\overrightarrow{E}$-pattern.

A positive charge q is moved from A to B in each diagram :

Draw the equipotential surface due to a system of two identical positive charges.

Draw the equipotential surface due to a dipole.

What will be the shape of equipotential surface in case of uniform electric field?

The shape of the equipotential surface due to a point charge is:

Assertion: Two equipotential surfaces cannot cut each other.
Reason: Two equipotential surfaces are parallel to each other.

Assertion(A): Electric field is always normal to equipotential surfaces and along the direction of decreasing order of potential.

Reason (R): Negative gradient of electric potential is electric field.

Nature of equipotential surface for a point charge is

The shape of equipotential surface due to point charge is always spherical.

What is equipotential surface? Draw the equipotential surface due to point charge.

Draw an equipotential surface in a uniform electric field.

What is the direction of the lines of force at any point on the equipotential surface?

The current following through a pure inductor of inductance $4 \mathrm{mH}$ is $i=12\cos 300t$ ampere. What is $rms$.

The instantaneous values of current and voltage in an circuit are given by $I=6\sin \left(100\mathrm{\pi t}+\frac{\mathrm{\pi }}{4}\right),V=5\sin \left(100\mathrm{\pi t}-\frac{\mathrm{\pi }}{4}\right)$. Then