1 Which plate carries a positive charge 2 How many slabs of

1) Which plate carries a positive charge?

2) How many slabs of material have been inserted between the plates?

N = _________

Solution

1)

As the direction of electric field is from the left plate to the right plate,

So, the left plate is the positive plate

2)

As the electric field is less than what is in the region where there is air.

So, from the plot, we see there are 2 troughs of the curve

So, the number of slabs of materia are : N = 2