Voltage Division: Troubleshooting Issues

In summary, The conversation is about voltage division and the correct method to solve for the equivalent resistance in a parallel circuit. The person asking for help is confused about why their first attempt at solving the problem gave the wrong answer. The responder explains that the voltage division principle is based on the conservation of current through two circuit elements in series, and the equivalent resistance must be found for the two elements in parallel. They also question why the 20 Ohm resistor was ignored in the first attempt.
  • #1
salman213
302
1
CHECK IMAGE,

I guess I do not understand voltage division properly can someone see why this doesn't work.

Why is the first one giving the wrong answer..?

thanks
 

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  • #2
Yes, you have to combine the two parallel resistors into their equivalent resistance. Why did you ignore the 20 Ohm resistor in your first attempt?
 
  • #3
It's true that the voltage drop across parallel circuit elements are always the same, but the voltage division principle is not based on that. Rather it's based on the conservation of current though 2 circuit elements in series. You have to find the equivalent resistance for the two elements because the 5 ohms is not in series with the 4 ohms.
 

FAQ: Voltage Division: Troubleshooting Issues

What is voltage division?

Voltage division is a method used to calculate the voltage across each resistor in a series circuit. It is based on the principle that the total voltage in a series circuit is equal to the sum of the individual voltage drops across each component.

What are some common issues that can arise when using voltage division?

Some common issues that can arise when using voltage division include incorrect resistor values, damaged or defective resistors, and incorrect circuit connections. These issues can result in inaccurate voltage calculations and can affect the overall performance of the circuit.

How can I troubleshoot voltage division issues?

To troubleshoot voltage division issues, you should first check the values of the resistors in the circuit to ensure they are correct. If any resistors are damaged or defective, they should be replaced. You should also double-check all circuit connections to ensure they are correct and secure.

Can voltage division be used in any type of circuit?

Yes, voltage division can be used in any type of series circuit, including simple circuits, complex circuits, and circuits with multiple power sources. However, it is important to note that voltage division may not be accurate in circuits with non-linear components, such as diodes or transistors.

Are there any limitations to using voltage division?

While voltage division is a useful method for calculating voltage in series circuits, it does have some limitations. It is only accurate in circuits with linear components, and it assumes that the resistance of the components is constant. Additionally, voltage division does not take into account any external factors that may affect the circuit, such as temperature or interference.

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