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## Homework Statement

A 10-cm-diameter parallel-plate capacitor has a 1.0 mm spacing. The electric field between the plates is increasing at the rate 1.4×106V/m*s.

What is the magnetic field strength 2.7cm from the axis?

## Homework Equations

[itex]\oint[/itex]B*ds=[itex]\mu[/itex][itex]\epsilon[/itex]dE(t)/dt*A

B=([itex]\mu[/itex][itex]\epsilon[/itex]dE(t)/dt*A)/(2[itex]\pi[/itex]r)

B=([itex]\mu[/itex]I

_{d})/(2[itex]\pi[/itex]R

^{2})*r

## The Attempt at a Solution

I tried using the first equation:

8.85E-12*4[itex]\pi[/itex]E-7*1.4E6*[itex]\pi[/itex](0.05)

^{2}/(2[itex]\pi[/itex]*0.027)=

7.2E-13T which is wrong