Calculate the ratio of resistance of a 50 w bulb and a 25 w bulb
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Cobsider the resistance of bulb with power 25W as R1 and that of bulb witj power 50 W as R2.
So,as the voltage is constant , we can take the ratio as follows
P1/P2=R2/R1
25/50=R2/R1
So , ratio =R1/R2=50/25=2/1=2:1(ans)
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