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There is one conducting circular loop of radius R, which carries current I. There is another conducting circular loop of radius r placed coaxially at a distance x from it. Here r lt lt R and xgt gt R. Emf induced in the smaller loop when current in the bigger loop is changed at a rate of alpha is. |
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Answer» `(mu_(0)alphaR^(2)r^(2))/(2pix^(3))` `epsilon= (dphi)/(dt)` Emf induced when current is CHANGED can be written as follows:`epsilon= (mu_(0)R^(2)pir^(2))/(2x^(3))(dI)/(dt)` `epsilon= (mu_(0)R^(2)pir^(2))/(2x^(3)) alpha` `epsilon= (mu_(0)alphaR^(2)pir^(2))/(2x^(3))` Hence, option (b) is correct. |
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