Two bulbs have filaments of lengths, Emissi-vities and diameters in the ratio of 2 : 1. If ratio of their powers is 1 : 2 then, ratio of their temperatures is

Two bulbs have filaments of lengths, Emissi-vities and diameters in th

1.	Two bulbs have filaments of lengths, Emissi-vities and diameters in the ratio of 2 : 1. If ratio of their powers is 1 : 2 then, ratio of their temperatures is
Answer» `1:1` `1:2` `2:1` `1:4` ANSWER :B