Two plates are at potentials \( -10 \mathrm{~V} \) and \( +30 \mathrm{~V} \). If the separation ...

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Two plates are at potentials \( -10 \mathrm{~V} \) and \( +30 \mathrm{~V} \). If the separation hetween the plates is \( 2 \mathrm{~cm} \), the electric field hetween them is
(A) \( 2000 \mathrm{~V} / \mathrm{m} \)
(B) \( 1000) \cup / \) जो
(C) \( 500 \times / m \)
(D) \( 3000 \mathrm{~V} / \mathrm{m} \)
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