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college Physics problem (You want to create an electric field E = N/C at location …)?

OMG, I have 2 physics probem in front of me and have no idea how to solve.1.You want to create an electric field E = < 0, 30000, 0 > N/C at location < 0, 0, 0 >. A) Where would you place a proton to produce this field at the origin? mB) Instead of a proton, where would you place an electron to produce this field at the origin? mWhat is the electric field at a location = < - 0.3, - 0.5, 0 > m, due to a particle with charge +4 nC located at the origin?E = N/CPlease help...

2 Answers

A) Ey = Q/4πεr² = (1.6x10^-19)(9x10^9)/r² = 30000 r = √{(1.6)(9x10^-10)/3x10^4} = √4.8x10^-14 = 2.19x10^-7 m on -y axisB) r = 2.19x10^-7 m on +y axisC) E = Q/4πεr², where: r² = 3² + 0.5²= 9.25 and k = 1/4πε = 9x10^9, also Q = +4x10^-9 C E = (4x10^-9)(9x10^9)/9.25 = 3.892 N/C... Show More
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