AP Physics C: E&M
9.2 Electric Potential
The electric potential along the \(x\)-axis in a certain region of space is given by the function \(V(x) = ax^2 - bx\), where \(a\) and \(b\) are positive constants with appropriate SI units. Which of the following expressions represents the \(x\)-component of the electric field, \(E_x(x)\), as a function of position?
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