Q.

An electric dipole of moment p→ placed in a uniform electric field E→ has minimum potential energy when the angle between p→ and E→ is

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a

Zero

b

π2

c

π

d

3π2

answer is A.

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Detailed Solution

U=−PEcos⁡θIt has minimum value when θ=0∘ i.e. (U)min=−PE×cos⁡0∘=−PE
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Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
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An electric dipole of moment p→ placed in a uniform electric field E→ has minimum potential energy when the angle between p→ and E→ is