Two heating coils of resistance `10Omega` and `20Omega` are connected in parallel and connected to a battery of emf 12V and internal resistance `1Omega`. The power consumed by them are in the ratio

Options

A. `1:4`
B. `1:3`
C. `2:1`
D. `4:1`

Answer

C

Explanation

`P=(V^(2))/(R ),Pprop(1)/(R )`
`(P_(1))/(P_(2))=(R_(2))/(R_(1))=(20)/(10)=(2)/(1)` for constant V