Two charged concentric spherical shells have radii of 11.0 cm and 14.0 cm. The charge on the inner shell is 3.50 ✕ 10−8 C and that on the outer shell is 1.60 ✕ 10−8 C. Find the magnitude of the electric field at the following points.

The magnitude of the electric field are and

Explanation:

Given that,

Radius of inner shell = 11.0 cm

Radius of outer shell = 14.0 cm

Charge on inner shell

Charge on outer shell

Suppose, at r = 11.5 cm and at r = 20.5 cm

We need to calculate the magnitude of the electric field at r = 11.5 cm

Using formula of electric field

Where, q = charge

k = constant

r = distance

Put the value into the formula

The total charge enclosed  by a radial distance 20.5 cm

The total charge is

Put the value into the formula

We need to calculate the magnitude of the electric field at r = 20.5 cm

Using formula of electric field

Put the value into the formula

Hence, The magnitude of the electric field are and

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that would be because of both gravity and friction. so     c