Q.

An artificial satellite is rotating in a circular orbit of radius r around the earth. Then which one of the following graphs correctly shows the variation of its angular momentum L with orbit radius?

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a

b

c

d

answer is A.

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Detailed Solution

L=mvr=mGMr.r=mGMr⇒L2=m2GMr⇒L2∝rSo L - r graph is a parabola as shown in (1)
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An artificial satellite is rotating in a circular orbit of radius r around the earth. Then which one of the following graphs correctly shows the variation of its angular momentum L with orbit radius?