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The figure shows as circular region of radius `R` occupied by a time varying mgnetic field `B(t)` such that `(dB)/(dt)lt0`. The magnitude of induced electric field at the point `P` at a distance `r lt R` is A. decreasing with `r`B. increasing with `r`C. not varying with `r`D. varying as `r^2` |
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Answer» Correct Answer - B `El=(dphi)/(dt)=S (dB)/(dt)` `:. E(2pir)=pir^2(dB)/(dt)` or `E=r/2 (dB)/(dt)` or `Epropr` |
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