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Q.

In a certain region of space, the gravitational field is given by -k / r , where r is the distance and k is a constant. If the gravitational potential at r = r0 be V0 , then what is the expression for the gravitational potential V?

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a

k log (r/r0)

b

k log (r0/r)

c

V0 + k log (r/r0)

d

V0 + k log (r0/r)

answer is C.

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Detailed Solution

Here, I=dVdr=k/r (or) dV=kdrr then integrate 

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In a certain region of space, the gravitational field is given by -k / r , where r is the distance and k is a constant. If the gravitational potential at r = r0 be V0 , then what is the expression for the gravitational potential V?