An electric field converges at the origin whose magnitude is given by the expression $E = 100\,r\,Nt/Coul$, where $r$ is the distance measured from the origin.
total charge contained in any spherical volume with its centre at origin is negative.
total charge contained at any spherical volume, irrespective of the location of its centre, is negative.
total charge contained in a spherical volume of radius $3\, \,cm$ with its centre at origin has magnitude $3 \times 10^{-13}\ C.$
all of the above
Which of the following figure represents the electric field lines due to a single positive charge?
Draw electric field by negative charge.
If a charge $q$ is placed at the centre of a closed hemispherical non-conducting surface, the total flux passing through the flat surface would be
Two charges of $5 Q$ and $-2 Q$ are situated at the points $(3 a, 0)$ and $(-5 a, 0)$ respectively. The electric flux through a sphere of radius $4a$ having center at origin is
Two surfaces $S_1$ and $S_2$ are shown in figure. Flux associated with $S_1$ is ${\phi _1}$ and $S_2$ is ${\phi _2}$. Which is correct ?