NEET · Physics · STD 12 - 1. Electric charges and fields
Two point charges \(-q\) and \(+q\) are placed at a distance of \(L\), as shown in the figure. The magnitude of electric field intensity at a distance \(R ( R \gg L )\) varies as :
- A \(\frac{1}{ R ^{3}}\)
- B \(\frac{1}{ R ^{4}}\)
- C \(\frac{1}{ R ^{6}}\)
- D \(\frac{1}{ R ^{2}}\)
Answer & Solution
Correct Answer
(A) \(\frac{1}{ R ^{3}}\)
Step-by-step Solution
Detailed explanation
It is electric dipole at large distance electric field intensity \(E=\frac{K P}{R^{3}} \sqrt{1+3 \cos ^{2} \theta}\)
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