Question about Grounding in this Circuit

In summary, the explanation for 27-7 (a) is that the potential at point a is zero because it comes after the grounding point and before anything else. However, the potential at point b in 27-7 (b) is also zero, even though it comes before the grounding point. This is because the voltage for the entire top portion between the internal resistor of the battery and the resistor to the right is all the same, at zero. It doesn't matter whether the point comes before or after the grounding symbol, the voltage remains the same.
  • #1
rtareen
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TL;DR Summary
I want to know why the voltage at point b is zero even through it comes before the grounding point in the circuit.
Click the attached file to see the figure and the book's explanation. The explanation for 27-7 (a) makes sense as the point a comes after the grounding point and before anything else. Therefore it should have a potential of zero. But, to me, 27-7 (b) doesn't make any sense. Why should the potential ##V_b## be zero when it comes before the grounding point? Shouldnt any point after the grounding symbol, but before the resistor, have a potential of zero? Why is the voltage at b zero?
 

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  • #2
It doesn't matter whether it comes before or after, the voltage for the entire top portion between the internal resistor of the battery and the resistor to the right is all the same, it is all zero.
 
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  • #3
Kyouran said:
It doesn't matter whether it comes before or after, the voltage for the entire top portion between the internal resistor of the battery and the resistor to the right is all the same, it is all zero.
Oh ok Thank you
 

Related to Question about Grounding in this Circuit

1. What is grounding in a circuit?

Grounding in a circuit refers to the process of connecting a conducting object, such as a wire, to the ground or earth. This is done to provide a safe path for excess electrical current to flow in the event of a fault or surge in the circuit.

2. Why is grounding important in a circuit?

Grounding is important in a circuit because it helps to protect against electric shock and damage to electrical equipment. It also helps to stabilize the voltage in the circuit and prevent unwanted electrical interference.

3. How is grounding achieved in a circuit?

Grounding is achieved by connecting a wire from the circuit to a grounding rod or plate that is buried in the ground. This creates a low-resistance path for the excess electrical current to flow into the ground.

4. Can a circuit function without proper grounding?

Yes, a circuit can still function without proper grounding. However, it is not recommended as it can pose a safety hazard and increase the risk of electrical fires or damage to equipment.

5. How can I check if a circuit is properly grounded?

To check if a circuit is properly grounded, you can use a multimeter to measure the resistance between the ground wire and the ground pin of an outlet. If the resistance is low (usually less than 5 ohms), then the circuit is properly grounded. Alternatively, you can also hire a licensed electrician to perform a more thorough inspection.

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