Question

What is the potential difference DeltaV across the unknown element in the circuit shown in the figure? Express your answer as if traveling across the element in the direction shown in the figure.

Answer 1

Answer:
1 V

Use the direction of the current. If the current goes from a negative terminal to a positive one, the deltaV across that given component is positive. The opposite is negative. Hence, you have a (+6, -4, -3). If you add up all the values, it must equal zero. Hence, the last value must be a potential difference of +1 (negative terminal on the bottom, positive terminal on the top).