In the circuit shown, what are the values of the internal resistance across the open-circuited (a and b) and of the Thevenin’s voltage between the terminals a and b?

In the circuit shown, what are the values of the internal resistance a

1.	In the circuit shown, what are the values of the internal resistance across the open-circuited (a and b) and of the Thevenin’s voltage between the terminals a and b?
A.	1.43 Ω and 12 V
B.	7 Ω and 20 V
C.	1 Ω and 11 V
D.	8 Ω and 10 V
Answer» C. 1 Ω and 11 V