In the circuit shown in the figure (Figure 1) . the 6.0 ohm resistor is consuming energy at a rate of 22.0 J/s when the current through it flows as shown.

http://session.masteringphysics.com/problemAsset/1267081/2/yg.19.62.jpg

Find the current through the ammeter A.

What are the polarity and emf of the battery E, assuming it has negligible internal resistance?

Question

In the circuit shown in the figure (Figure 1) . the 6.0 ohm resistor is consuming energy at a rate of 22.0 J/s when the current through it flows as shown.

http://session.masteringphysics.com/problemAsset/1267081/2/yg.19.62.jpg

Find the current through the ammeter A.

What are the polarity and emf of the battery E, assuming it has negligible internal resistance?

anonymous · Answer

u should find what the current which flows in the 6 ohm resistor by using P=I^2 *R 
Then you can use kirchhoff voltage law for both loops.