A student thrusts a 0,20T magnet with a cross sectional area of 2.0 cm^2 into a coil of 400 turns in 0,50s. The coil has a resistance of 30 ohms and it is connected in series with a moving coil meter having a resistantace of 170 ohms. What is the average velocity and the current?

Answer 1

Figure the induced voltage (Faradays law)
EMf=N *B*A/time

Then divide this induced EMF by total resistance to get current.

http://physics.bu.edu/~duffy/PY106/InducedEMF.html

Answer 2

EMF = BLV i don't have the length but im trying to find the velocity?

Answer 3

go back to my formula. It is the basis for yours.