Three resistors are connected in parallel across a power supply, as shown.
The power dissipated in each of the resistors of resistance 2 Ω, 3 Ω and 4 Ω is ${P_2},{P_3}$ and ${P_4}$ respectively.
What is the ratio ${P_2}:{P_3}:{P_4}$?

1 )
2 : 3 : 4
2 )
4 : 3 : 2
6 : 4 : 3
4 )
36 : 16 : 9
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