answer it plz Don't have time enough
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Answer:
V
a
−ε
1
=V
c
−ir
1
−iR and i=(ε
1
−ε
2
)/(R+r
1
+r
2
), we get
V
a
−V
c
=ε
1
−i(r
1
+R)=ε
1
−(
R+r
1
+r
2
ε
1
−ε
2
)(r
1
+R)
=4.4V−(
5.5Ω+1.8Ω+2.3Ω
4.4V−2.1V
)(2.3Ω+
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