H2P-409
Field of a point charge
H2 Physics · JC 2 · Medium · Field of a point charge
Two identical small spheres, each of charge +Q, are fixed 0.20 m apart in vacuum. The electric field strength at a point midway between them is zero. A third small charge of +2Q is now placed exactly at the midpoint. What is the electric field strength at the midpoint after this charge is added?
- 0 N C⁻¹
- 4.5 × 10³ N C⁻¹ towards one sphere
- 9.0 × 10³ N C⁻¹ towards one sphere
- 1.8 × 10⁴ N C⁻¹ away from both spheres
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