Assertion: A charged particle is moving in a circle with constant speed in uniform magnetic field. If we increase the speed of particle to twice, its acceleration will become four times.
Reason: In circular path of radius `R` with constant speed `v`, acceleration is given by `v^2/R`

Options

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

Answer

D

Explanation

`Rpropv,` by increasing the speed two times radius also becomes two times. Hence, acceleration `(=v^2/R)` will also become only two times.