can someone please help me on unbalanced Wheatstone bridge.
I tried search this on google and i didn't understand it. i understand the balanced Wheatstone bridge but not the unbalanced.
200 views and no help?
You have a college-level question here. Please be patient and wait for a tutor who specializes in this level of science.
well, I'm confused about your confusion. I googled the subject and watched several videos and read several articles. Seems fairly straightforward to me. I'm sure I can't explain it better here in a few words than all of that.
Certainly! I can help you understand the concept of an unbalanced Wheatstone bridge.
A Wheatstone bridge is a circuit configuration commonly used for measuring resistance. It consists of four resistors arranged in a diamond shape, with a power source connected across one diagonal and a galvanometer (a sensitive current-measuring device) connected across the other diagonal.
In a balanced Wheatstone bridge, the resistance on one side of the bridge is equal to the resistance on the other side, resulting in zero current passing through the galvanometer. This balance condition is used to determine the unknown resistance by adjusting known resistances until the galvanometer shows no deflection.
However, in an unbalanced Wheatstone bridge, the resistances on both sides of the bridge are not equal. This creates a non-zero current in the galvanometer, which can be used to calculate the unknown resistance.
To understand the behavior of an unbalanced Wheatstone bridge, you need to have a basic understanding of Kirchhoff's laws and Ohm's law.
Kirchhoff's laws state that the sum of currents entering a junction is equal to the sum of currents leaving the junction (Kirchhoff's current law) and that the sum of voltage drops around any closed loop in a circuit is equal to the sum of voltage rises (Kirchhoff's voltage law).
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them.
To analyze an unbalanced Wheatstone bridge, follow these steps:
1. Write down Kirchhoff's second law equation for each closed loop in the bridge. This will give you a set of equations involving the resistances and known voltages.
2. Apply Kirchhoff's first law at each junction in the bridge. This will give you another set of equations involving the currents.
3. Combine the equations obtained from steps 1 and 2 to form a system of equations.
4. Solve the system of equations to find the current flowing through the galvanometer.
5. Once you have the current, you can use Ohm's law to calculate the unknown resistance in the circuit.
Overall, understanding the unbalanced Wheatstone bridge requires a good grasp of electrical circuit analysis principles. If you are still having trouble, it may be helpful to consult a textbook or seek additional resources that provide detailed explanations and examples of unbalanced Wheatstone bridge circuits.