E field induced by changing B field

Thread starter Zywo
Start date Apr 7, 2010
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B field Field Induced

AI Thread Summary

The discussion centers on calculating the electric field strength inside a solenoid with a decreasing magnetic field. The magnetic field is given as 2.0 T, decreasing at a rate of 4.90 T/s. The initial calculation for the electric field strength was found to be 0.06125 V/m. However, it is clarified that the electric field should actually be 0 V/m because the distance from the axis at that point is 0. The key takeaway is that the electric field induced by a changing magnetic field at the axis of the solenoid is zero.

Apr 7, 2010

Zywo

Homework Statement

The magnetic field inside a 5.0-cm-diameter solenoid is 2.0 T and decreasing at 4.90 T/s
What is the electric field strength inside the solenoid at point on the axis?

Homework Equations

E=(r/2)*(dB/dt)

The Attempt at a Solution

E=(.025/2)*(4.9)= 0.06125 V/m

Not sure what's wrong here...

Thanks,
David

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Nov 21, 2010

couyang2

Should be 0 because the distance from the axis is 0.

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