Assertion : The difference in `g` at the poles and the equator of the earth is directly proportional to the square of its angular velocity.
Reason : The value of `g` is minimum at the equator and maximum at poles.

Options

A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
B. If both Assertion and Reason are true but Reason is not a correct explanation of the Asseration.
C. If Assertion is true but the Reason is false.
D. If both Assertion and Reason are false.

Answer

B

Explanation

Here, both assertion and reason are true but reason is not a correct explanation of asseration.
As `g' = g - R omega^(2) cos^(2) lambda`, at equator `lambda = 0` and at the poles `lambda = 90^(@)`. Thus `(g')_("poles") = g`
and `(g')_("equator") = g -R omega^(2)`
also `(g')_("poles") -(g')_("equator") = R omega^(2)`