Two electric bulbs rated P1 and P2 watt at V volt are connected in series across V volt mains ,then their total power consumption P is 1) (P1+P2) 2)√P1 P2 3)P1P2 /( P1+P2 ) 4)(P1 + P2 )/P1 P2. Give reasons.

R1 = V2/p1R2 =  V2/p2R = R1+R2I = V/R=V/R1+R2p= I2(R1+R2)p=V2R1+R22R1+R2 = V2R1+R2=1R1V2+R2V2=11p1+1p2p = p1p2p1+p2

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