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

E**xpress your answer using two significant figures.**

**Concepts and reason**

The concept use to this problem is Kirchhoff’s law and potential between two points.

Initially, apply Kirchhoff’s loop law in the circuit. Then, find the potential between the points a and c. Finally, find the potential at point b.

**Fundamental**

The expression for the Kirchhoff’s voltage law is as follows:

Here, V is the potential.

**Answer:**

The following is the circuit diagram showing the direction of current as follows:

**Explanation:**

The potential at point c, that is, the lower right point is equal to,

Therefore, applying the Kirchhoff’s voltage in the circuit as follows:

**Explanation:**

According to the Kirchhoff’s voltage law, the sum of the voltages meeting at a single point is equal to zero. And the voltage is equal to the product of the current and the resistance in the circuit.

**Explanation:**

The current is flowing through the resistor at point a from left to right and the current is flowing through resistor at point b from right to left.