physics

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?

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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

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

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

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bobpursley

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