A spherical shell is cut into two pieces along a chord as shown in the figure. P is a point on the plane of the chord. The gravitational field at P due to the upper part is I1 and that due to the lower part is I2 . What is the relation between them?
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a
I1 > I2
b
I1 < I2
c
I1 = I2
d
no definite relation
answer is C.
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Detailed Solution
At the point P, we have I1 = I2 = 0 (because the gravitational field inside a shell is zero). Hence I1 = I2