The magnetic force Fr acting on the charge is always directed toward the center of the circle. Magnetic field lines coming out of the paper are indicated Bin by dots, representing the tips of arrows coming outward. V FB B X Magnetic field lines going into the paper are indicated + by crosses, representing the feathers of arrows going X q X inward. EF = FB = ma my2 mv FB = qVB = r= qB b V qB 2atr 21 2am T = W= - V qB Procedure: m Exercise 1. Open Program https://phet.colorado.edu/en/simulation/legacy/magnet-and-compass 1. Click on show field 2. Click on show compass 3. Move compass left to right and write what you observed