Question

Assertion :For a very near to the earth's surface the time period of revolution is given by $1h$ $24min$ Reason: The period of revolution of a satellite depends only upon its height above the earth's surface

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

From above concept $h=R$

$T=2\pi \sqrt{\frac{R}{g}}$

substituting $R=6400\times {10}^{3}m$ and $g=10m/s^2$

$T=5024s=84minutes=1hr24minutes$

Hence assertion and reason both are correct.