Question

In: Physics

What is the balanced condition of Wheatstone Bridge circuit?

What is the balanced condition of Wheatstone Bridge circuit?

Solutions

Expert Solution

The bridge is in balance condition when no current flows through the coil or the potential difference across the galvanometer is zero. This condition occurs when the potential difference across the a to b and a to d are equal, and the potential differences across the b to c and c to d remain same.

Derivation :

Wheatstone bridge (balanced) - Let i be the current from battery E .At point A , current i1​ flows through resistance P and current i−i1​ flows through R. In balanced state , no current flows through BD , hence point B and D are at same potential .Therefore current i1​ flows through resistance Q also and current i−i1​ flows through S.

Applying Kirchhoff's loop rule in closed mesh ABDA ,

i1​P−(i−i1​)R=0

or i1​P=(i−i1​)R  ...................eq1

In closed mesh BCDB ,

i1​Q−(i−i1​)S=0

or i1​Q=(i−i1​)S  ...................eq2

Dividing eq1 from eq2 , we get

P/Q=R/S  

This is the condition for balance in a Wheatstone's bridge .


Related Solutions

In the event that the Wheatstone Bridge is NOT level (balanced), can the Series circuit be...
In the event that the Wheatstone Bridge is NOT level (balanced), can the Series circuit be resolved? Can it be solved in parallel? What method would you use?
Choose the correct answer from the followings: a) In Wheatstone bridge, when it is balanced the...
Choose the correct answer from the followings: a) In Wheatstone bridge, when it is balanced the galvanometer reads 1. Infinity 2. Zero 3. 5 mA 4. 10 mA b) In PMMC, dumping force helps ............. 1. To move the pointer to read our measurements correctly 2. To reset our readings back to zero 3. To stabilize the pointer during transition between readings 4. All the above c) A current transformers are used for: 1. For cost effective measurement 2. For...
The circuit shown in the figure below, called the Wheatstone bridge, is used to determine the...
The circuit shown in the figure below, called the Wheatstone bridge, is used to determine the value of unknown resistor Xby comparison with three resistors M, N, and P whose resistances can be varied. For each setting, the resistance of each resistor is precisely known. With switches K1 and K2 closed, these resistors are varied until the current in the galvanometer G is zero; the bridge is then said to be balanced. (a) Show that under this condition the unknown...
please provide an example of a wheatstone bridge circuit in a HALF brindge as well as...
please provide an example of a wheatstone bridge circuit in a HALF brindge as well as a FULL bridge with hand calculations.
Using credible sources, explain how the Wheatstone bridge circuit is applied in two biomedical devices. explain...
Using credible sources, explain how the Wheatstone bridge circuit is applied in two biomedical devices. explain why this circuit was used in these devices!
What are the advantages of Wheatstone bridge measurement over a direct resistance measurement if for a...
What are the advantages of Wheatstone bridge measurement over a direct resistance measurement if for a temperature sensor?
Design a system to measure bending strain using a full-bridge wheatstone bridge configuration.
Design a system to measure bending strain using a full-bridge wheatstone bridge configuration.
Using a wheatstone bridge, solve for Vout for quarter, half, and full bridges and determine which...
Using a wheatstone bridge, solve for Vout for quarter, half, and full bridges and determine which one is most sensitive. Draw a diagram showing how you would place your strain gauges on a beam for each configuration. Discuss how you should use the right kind of strain gauge with appropriate G values to maximize the sensitivity.
For a channel with subcritical flow condition, a bridge opening constriction produces a reduction of about...
For a channel with subcritical flow condition, a bridge opening constriction produces a reduction of about 10% of the original channel width due to the structural elements. Therefore, hydraulically speaking, the water is accelerated at the opening and its water depth is lower than the water depth from the upstream bridge. True or False? Explain.
3. Describe a scenario where driving a bridge circuit with a constant cur- rent source is...
3. Describe a scenario where driving a bridge circuit with a constant cur- rent source is more advantageous than driving the circuit with a constant voltage source.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT