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A thin plastic ring of radius R-0.45 m is sprayed with electrically charged paint in a manner that half of the
ring has a constant line charge density of +2 and the other half has constant line charge density of -λ, where 2
- 9.8 mC/m.
-7
О
+2
Part (a)
Enter an expression for the magnitude of the electric field at the center of the ring. (Note: E is not zero even though the total charge on the ring is clearly zero.)
Grade Summary
E-
Deductions
Potential
