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March 26, 2017

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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?

  • physics - ,

    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

  • physics - ,

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

  • physics - ,

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

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