VITEEE 2010 Paper

Current through arms of resistances P and Q in series
i1=

i×330

330+110

=

3

4

i
Here i = total current
Similarly, current through arms of resistances R and S in series
i2=

i×110

330+110

=

1

4

i
Heat developed per second = i2R
∴ Ratio of heat developed per sec
HP:HQ:HR:HS
= (

3

4

i)2×100:(

3

4

i)2×10:(

1

4

i)2×300 :(

1

4

i)2×30
= 30:3:10:1