# Asmall sphere with charge qa = +5.10 µc is at the origin, and a second sphere with charge qb = −4.20

###### Question:

Asmall sphere with charge qa = +5.10 µc is at the origin, and a second sphere with charge qb = −4.20 µc is located at x = 2.50 m. at what finite distance from the origin is the electric field equal to zero?

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