Tag: coulomb's law
Questions Related to coulomb's law
Which of the following is true for uniform electric field ?
The electric field and the electric potential at a point are E and V respectively. Then, the incorrect statements are :
A charge of $6.76$ $\mu$C in an electric field is acted upon by a force of $2.5 N$. The potential gradient at this point is :
The electric potential decreases uniformly from $120$ V to $80$ V as one moves on the X-axis from x $=$ -1 cm to x $=$ $+1$ cm. The electric field at the origin :
The electric field in a region is directed outward and is proportional to the distance r from the origin. Taking the electric potential at the origin to be zero,
A uniform electric field of $20$ NC$^{-1}$ exists along the x-axis in space. The potential difference V$ _B-$V$ _A$ for the point A $=$ $(4 m, 2m)$ and B $=$ $(6m, 5m)$ is:
The electric field at the origin is along the positive X-axis. A small circle is drawn with the centre at the origin cutting the axes at points A, B, C and D having coordinates $(a, 0), (0, a), (-a, 0), (0, -a)$ respectively. Out of the given points on the periphery of the circle, the potential is minimum at :
It is found that air breaks down electrically, when the electric field is $ 3 \times 10^{6} \mathrm{V} / \mathrm{m} . $ What is the potential to which a sphere of radius $1 \mathrm{m} $ can be raised, before sparking takes place?
In moving from A to B along an electric field line, the wok done by the electric field on an electron is $6.4 \times 10^{-19}$ J. If $\phi _1$ and $\phi _2$ are equipotential surfaces, then the potential difference $V _b-V _A $ is
The equation of an equipotential line is an electric field is y = 2x, then the electric field strength vector at (1, 2) may be