If power in external resistance `R` is maximum, then (i) `R = r` (ii) Power in `R` is `(E^2)/(4R)` (iii) Input power is `(E^2)/(

If power in external resistance `R` is maximum, then

(i) `R = r`
(ii) Power in `R` is `(E^2)/(4R)`
(iii) Input power is `(E^2)/(2R)`
(iv) Efficiency is `50%`
A. (i) , (ii)
B. (ii), (iii)
C. (i),(iii),(iv)
D. all

If power in external resistance `R` is maximum, then (i) `R = r` (ii) Power in `R` is `(E^2)/(4R)` (iii) Input power is `(E^2)/(2R)` (iv) Efficiency i

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