A spherical hole is made in a solid sphere of radius R. The mass of the sphere before hollowing was M. The gravitational field at the centre of the hole due to the remaining mass is –Fig.
A
Zero
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
By the principle of superposition of fields
= 
+ 
Here, 
= net field at the centre of hole due to entire mass
= field due to remaining mass
and 
= field due to mass in hole = 0
∴ 
= 
= 
.r
where r = 
∴ 
= 
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