Circular motion will most likely be tested in conjunction with either g field or B field.
Get ready your equations:
GMm/r2 = mw2r or mv2/r
Bqv = mw2r or mv2/r
Make sure you don't get entangled by this equations. The g field somehow end up with T2 and r3.
The B field somehow end up with Bqr = mv. Priorities which equation to use so that you are in familiar grounds . The connecting equation is v = rw.
To know the circle in g field is easy as its centre is in the direction of gravitational force also the centripetal force.
To know the circle in B field will require the use of FLH rule. Paying attention to the direction to velocity as direction of current(for +charge).