P25_065 - 65. On the dipole axis θ = 0 or π , so | cos...

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Unformatted text preview: 65. On the dipole axis θ = 0 or π , so | cos θ| = 1. Therefore, magnitude of the electric field is |E (r )| = − ∂V p d = ∂r 4πε0 dr 1 r2 = p . 2πε0 r3 ...
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