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Question

Figure shows the variations of energy E with the orbit radius r of a satellite in circular motion. Choose the correct statement.
938771_6de979123cea4f03a6c41249fce8e78e.png

A
A shows the kinetic energy, B shows the total energy and C the potential energy of the satellite.
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B
A and B are kinetic energy and potential energy respectively and C the total energy of the satellite.
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C
A and B are potential energy and kinetic energy respectively and C the total energy of the satellite.
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D
C and A are the kinetic and potential energies and B the total energy of the satellite.
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Solution

The correct option is B A and B are kinetic energy and potential energy respectively and C the total energy of the satellite.
The kinetic energy of the satellite, K=GMm2r
Potential energy of the satellite, U=GMmr
Total energy of the satellite, E=GMm2r
In the figure, Variation of K with r is shown by curve A.
Variation of U with r is shown by curve B.
Variation of E with r is shown by curve C.
1077950_938771_ans_66c25b9281804b8997dea6b312cd5d89.png

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