I need help with these three questions. The fourth question is \"What is the pot

Question

I need help with these three questions. The fourth question is "What is the potential difference between the terminals of the battery?"

Find the current flowing through the 7.1- resistor Express your answer using two significant figures Item 10 The circuit in the figure (Figure 1) includes a battery with a finite internal resistance, r = 0.30 Submit My Answers Incorrect; Try Again; 6 attempts remaining | Figure 1 # | of 1 Part B Find the current flowing through the 32- resistor Express your answer using two significant figures 1.0 7.1 4.5 3.2 5.8 Submit My Answers Give Up r 12 V Part C How much current flows through the battery? Express your answer using two significant figures

Explanation / Answer

at junction c = i1 = i2 + i3 .....(1)

applying kirchoff law to loop 1

e - i1*(r + 4.5+1) - (i3*3.2) = 0

12 - i1*(0.3+4.5+1)-i3*3.2 = 0 ..............(2)

applying kirchoff law to loop 2

-i2*7.1 - i2*5.8 + i3*3.2 = 0

i3*3.2 - 12.9*i2 = 0 .....(3)

solving 1 2 , 3

i1 = 1.43 A

i2 = 0.28

i3 = 1.15 A

part(A)

current through 7.1 = i2 = 0.28 A

part(B)

curent through 3.2 = i3 = 1.15 A

part(C)

current through e = i1 = i2 + i3 = 1.43 A

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