# In the following figure, what is the value of the potential at points a and b?

In the following figure, what is the value of the potential at points a and b? (Figure 1) Express your answer using two significant figures separated by a comma.

According to Kirchhoff's voltage law, the current flow through the circuit is,

9-2 I-6-I=0\\
3 I =3 \\
I =1 \mathrm{~A}

The potential at point a is,

V_{a}-0=9 V

V_{a}=9 \mathrm{~V}

The potential at point b is,

V_{b}-0=I(1 \Omega)

V_{b}=1 \mathrm{~V}

Thus, the answer is 9,1.