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Figure shows the net power dissipated in...

Figure shows the net power dissipated in R versus the current in a simple circuit shown.

A

The internal resistance of battery is 0.2 `Omega`

B

The e.m.f. of battery is 2V

C

R at which power is 5W is 2.5 `Omega`

D

At power is 3.2W

Text Solution

Verified by Experts

At maximum power dissipation, `r=R` ,br> So `i=E/(2R)=5A and i^2R=5 ` watt solving `R=r=0.2Omega`
Also at `i=2A,P=i^2R`
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