Question

(3%) Problem 27: A thin plastic ring of radius R = 0.39 m is sprayed with electrically charged paint in a manner that half of the ring has a constant line charge density of +? and the other half has constant line charge density of -?, where ? = 8.9 mC/m. 33% 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.) E = 33% Part (b) In what direction is the electric field pointing at the center of the ring? 33% Part (c) Calculate the magnitude of the electric field at the center of the ring, in newtons per coulomb.

          (3%) Problem 27: A thin plastic ring of radius R = 0.39 m is sprayed with electrically charged paint in a manner that half of the ring has a constant line charge density of +? and the other half has constant line charge density of -?, where ? = 8.9 mC/m.

33% 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.)
E =

33% Part (b) In what direction is the electric field pointing at the center of the ring?
33% Part (c) Calculate the magnitude of the electric field at the center of the ring, in newtons per coulomb.

(3%) Problem 27: A thin plastic ring of radius R = 0.39 m is sprayed with electrically charged paint in a manner that half of the ring has a constant line charge density of +? and the other half has constant line charge density of -?, where ? = 8.9 mC/m.

33% 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.)
E =

33% Part (b) In what direction is the electric field pointing at the center of the ring?
33% Part (c) Calculate the magnitude of the electric field at the center of the ring, in newtons per coulomb.

Added by Joseph S.

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