Q. Assertion The total energy of the satellite is always negative irrespective of the nature of its orbit, i.e. elliptical or circular and it cannot be positive or zero.
Reason If the total energy is positive or zero, the satellite would leave its orbit.

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Solution:

Total energy of a satellite is always negative irrespective of the nature of its orbit. It indicates that the satellite is bound to the earth. At infinity, the potential energy and kinetic energy of satellite is zero.
Hence, total energy at infinity is zero, therefore only negative energy of satellite is possible when it is revolved around the earth.
If it is positive or zero, the satellite would leave its definite orbit and escape to infinity.
Therefore, Assertion and Reason are correct and Reason is the correct explanation of Assertion.