In the circuit shown in the figure ( Figure 1 ) . the 6.0 ? resistor is consumin

Question

In the circuit shown in the figure (Figure 1) . the 6.0 ?resistor is consuming energy at a rate of 24.0J/s when the current through it flows as shown.

Find the current through the ammeter A.?

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

In the circuit shown in the figure (Figure 1) . the 6.0 ?resistor is consuming energy at a rate of 24.0J/s when the current through it flows as shown. Find the current through the ammeter A.? What are the polarity and emf of the battery E, assuming it has negligible internal resistance?

Explanation / Answer

i = current through 6 ohm = [24/6]^0.5 =2 A

          

V1 = 25 -9*2 = 7 V

current through Ammeter =V1 /( 19+1 +10) = 7/30 = 0.233

current through 17 ohm = 2-0.233 =1.76

E = V1 -(17+13)*1.76 = -45.8   

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