A parallel-plate capacitor has a separation distance d betweenthe two plates and is connected to a battery to main a potentialdifference V between the two plates. The plates have a widthw and have a length L extending into the page. We graduallyinsert a metal slab of thickness t into the space between thetdx = 0two plates. Along the way, the slab is parallel with the twoplates. Find the electric force acting on the metal slab when it is inserted a distance x into the capacitor.(Don't forget that the external source that maintains the potential difference also does work on the movingcharges. You should find the force tends to draw the slab into the capacitor.)

Solution: The rod which is inserted into the parallel plate of distance x is in series combination…

Answered: A parallel-plate capacitor has a…

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