Two identical small spheres each carry a charge of +3.0×10−9C and are separated by 5.0×10−2m in air. What is the magnitude of the electric force between them? (Take k=9.0×109N m2C−2.)
3.2×10−5N
3.2×10−4N
8.1×10−8N
1.1×10−5N
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