NEET Questions Solved


The maximum power drawn out of the cell from a source is given by (where r is internal resistance)  

(1) E2/2r

(2) E2/4r

(3) E2/r

(4) E2/3r

(2) i=Er+RP=i2RP=E2R(r+R)2

Power is maximum when r = RPmax=E2/4r  

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