# Current And Power Dissipation

Circuit is attached

(a) Calculate the value of the current through the 12 V battery shown in

FIGURE 3.

(b) Calculate the power dissipated in R1, R2 and R.

https://brainmass.com/physics/current-law/current-and-power-dissipation-573922

#### Solution Preview

(a)

Let us assume current through R be I3 and comping out of battery of 12 V, i.e., all 3 currents are incident towards a junction.

EMFs:

E1 = 13 V

E2 = 14 V

E3 = 12 V

R1 = 1 ohm

R2 = 2 ohm

R = 3 ohm

At one of the two junctions, by Kirchhoff's current law (KCL),

I1 + I2 + I3 = 0 ...(1)

For closed ...

#### Solution Summary

In a given electric circuit, by using Kirchhoff current and voltage law, currents are estimated in associated resistances. Also, power dissipation in the resistances are estimated.

$2.19