Practicing Success
Two large plane parallel sheets shown in figure have equal but opposite surface charge densities +σ and -σ. A point charge q placed at points P1, P2 and P3 experiences forces F1, F2 and F3 respectively. Then Choose the correct answer from the options given below. |
$\vec{F}_1=0, \vec{F}_2=0, \vec{F}_3=0$ $\vec{F}_1 = 0, \vec{F}_2 \neq 0, \vec{F}_3 = 0$ $\vec{F}_1 \neq 0, \vec{F}_2 \neq 0, \vec{F}_3 \neq 0$ $\vec{F}_1 = 0, \vec{F}_3 \neq 0, \vec{F}_2 = 0$ |
$\vec{F}_1 = 0, \vec{F}_2 \neq 0, \vec{F}_3 = 0$ |
At point $p_1$ and $p_3$ field due to both plates are in opposite direction hence force on charges at these points are zero. At point $p_2$ the field due to both plates are in the same direction hence force will be non zero. The correct answer is Option (2) → $\vec{F}_1 = 0, \vec{F}_2 \neq 0, \vec{F}_3 = 0$ |