Electricity, Electrostatics, Current Electricity and DC Circuits Practice Questions | A-Level Physics

Electricity, Electrostatics, Current Electricity and DC Circuits

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Two point charges \(+Q\) and \(-Q\) are fixed on the \(x\)-axis at \(x=-a\) and \(x=+a\). Consider point \(P\) on the perpendicular bisector at \((0,y)\) with \(y>0\). Which statement about the electric field \(\vec{E}\) at \(P\) is correct?

Select one option.

\(\vec{E}\) is purely along \(+\hat{y}\) because vertical components add and horizontal cancel.
\(\vec{E}\) is purely along \(+\hat{x}\) because horizontal components add and vertical cancel.
\(\vec{E}\) is purely along \(-\hat{x}\) because horizontal components add and vertical cancel.
\(\vec{E}\) is purely along \(-\hat{y}\) because vertical components add and horizontal cancel.
\(\vec{E}=0\) because the fields from equal and opposite charges cancel at all points on the bisector.

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