iCON Education - Circular Motion AIIMS Test

Question 1: Palette 1/3

AIIMS 2019 MCQ

An electron is moving in a circle of radius 2m with speed of 4 m/s. Find the acceleration of the electron.

A

8 m/s$^2$

B

4 m/s$^2$

C

16 m/s$^2$

D

10 m/s$^2$

Question 2: Palette 2/3

AIIMS 2017 MCQ

The particle of mass $m$ is moving in a circular path of constant radius $r$ such that its centripetal acceleration $a_c$ is varying with time $t$ as $a_c=k^2 r t^2$, where $k$ is a constant. The power delivered to particle by the forces acting on it is

A

$2 \pi m k^2 r^2 t$

B

$m k^2 r^2 t$

C

$1 / 3 m k^4 r^2 t^5$

D

zero

Question 3: Palette 3/3

AIIMS 2017 MCQ

Assertion : For looping a vertical loop of radius, $r$ the minimum velocity at lowest point should be $\sqrt{5 g r}$.

Reason : In this event the velocity at the highest point will be zero.

A

Both assertion and reason are true and reason is the correct explanation of assertion

B

Both assertion and reason are true but reason is not the correct explanation of assertion

C

Assertion is true but reason is false

D

Both assertion and reason are false.