$A$ hollow conducting sphere is placed in an electric field produced by a point charge at point $P$. If the electric potentials at points $A$,$B$,and $C$ are $V_A$,$V_B$,and $V_C$ respectively,as shown in the figure,then:

This question has Statement-$1$ and Statement-$2$. Of the four choices given after the Statements,choose the one that best describes the two Statements.
Statement-$1$: No work is required to be done to move a test charge between any two points on an equipotential surface.
Statement-$2$: Electric lines of force at the equipotential surfaces are mutually perpendicular to each other.

The figure shows lines of constant potential in a region where an electric field is present. The electric field at point $B$ is............

In the figure,the charge $Q$ is at the centre of the circle. Work done is maximum when another charge is taken from point $P$ to:

$A$ point charge $+q$ is placed at the origin. The work done in moving another point charge $-Q$ along the straight line path $AB$ from point $A$ with coordinates $(0, a)$ to point $B$ with coordinates $(a, 0)$ is .......

The angle between an equipotential surface and the electric lines of force is .......$^o$.