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Which of the following field varies inversely with r^2?

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Which of the following field varies inversely with r^2?

(a) Far field

(b) Near field

(c) Radiation field

(d) Electrostatic field
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Correct option is (b) Near field

To explain I would say: Induction field is also known as ‘Near field’, varies inversely with r^2. Electrostatic field varies inversely with r^3. Far field is also known as Radiation field, varies inversely with r.
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