The power dissipated in the circuit show...

The power dissipated in the circuit shown in the figure is 30 watts. The value of R is:

A

`15Omega`

B

`10Omega`

C

`30Omega`

D

`20Omega`

Verified by Experts

The correct Answer is:

B

`P=(V^(2))/(R_("eq"))`
`30=((10)^(2))/(((5R)/(R+5)))`
`(5R)/(R+5)=(10)/(3)`
`3R=2R+10`
`R=10Omega`

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