Question

calculating current
at the test station you will test the current at points a and b on the first circuit shown below. then you will remove one of the 5ω resistors and determine the current at point c.
original resistor removed
what will the current be at point a in the original circuit?
what will the current be at point b in the original circuit?

Explanation:

Step1: Calculate total resistance in original circuit

In a series - circuit, the total resistance $R_{total}$ is the sum of individual resistances. So, $R_{total}=5 + 5+28.7=38.7\Omega$.

Step2: Use Ohm's law to find current in original circuit

Ohm's law is $I = \frac{V}{R}$, where $V = 2.72V$ and $R = R_{total}=38.7\Omega$. So, $I=\frac{2.72}{38.7}\approx0.07A$. In a series - circuit, the current is the same at all points.

Answer:

• What will the current be at point A in the original circuit? $0.07A$
• What will the current be at point B in the original circuit? $0.07A$