272168 In the figure the electric lines on the right have twice the separation of those on the left. If a charge particle takes time $t$ to move a distance $x$ in left region, then it will take time to travel the same distance in the right side region is:

272169 Point charge $q$ moves from point $P$ to point $S$ along the path $PQRS$ (as shown in fig.) in a uniform electric field E pointing co-parallel to the positive direction of $X$-axis. The coordinates of the points $P,Q,R$ and $S$ are $\left( a,b,0 \right)$, $\left( 2a,0,0 \right),\left( a,-b,0 \right)$ and $(0,0$, $0)$ respectively.

The workdone by the field in the above case is given by the expression

272168 In the figure the electric lines on the right have twice the separation of those on the left. If a charge particle takes time $t$ to move a distance $x$ in left region, then it will take time to travel the same distance in the right side region is:

272169 Point charge $q$ moves from point $P$ to point $S$ along the path $PQRS$ (as shown in fig.) in a uniform electric field E pointing co-parallel to the positive direction of $X$-axis. The coordinates of the points $P,Q,R$ and $S$ are $\left( a,b,0 \right)$, $\left( 2a,0,0 \right),\left( a,-b,0 \right)$ and $(0,0$, $0)$ respectively.

The workdone by the field in the above case is given by the expression