establish a relation between electric field and potential difference between two points in the field.
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The relationship between electric field EE and scalar potential φφ is given as
E=−∇φE=−∇φ
where ∇≡gradient operator.
The minus sign came in because the electric field points from a region of positive terminal toward a region of negative terminal, whereas the vector ∇φ∇φ is defined to so that it points in the direction of increasing φ.
E=−∇φE=−∇φ
where ∇≡gradient operator.
The minus sign came in because the electric field points from a region of positive terminal toward a region of negative terminal, whereas the vector ∇φ∇φ is defined to so that it points in the direction of increasing φ.
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