Metre Bridge Calculator

✖Electric resistance is the opposition to the flow of an electric current and is measured in ohms, representing how much a material hinders electric current flow.ⓘ Electric Resistance [R]			+10% -10%
✖Wire Length is the length of a wire that affects the resistance and conductivity of an electric circuit, influencing the flow of electric current.ⓘ Wire Length [L_wire]			+10% -10%
✖Final Length of Wire is the length of the wire after it has been stretched or compressed due to the flow of electric current.ⓘ Final Length of Wire [L_f,wire]			+10% -10%

✖Unknown Resistance is the opposition to the flow of electric current in a circuit, measured in ohms, and depends on the material and its dimensions.ⓘ Metre Bridge [R_x]

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Formula

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Metre Bridge

Formula

R x = R \cdot \frac{L wire}{L f,wire}

Example

8.215962 Ω = 15 Ω \cdot \frac{35 mm}{63.9 mm}

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Metre Bridge Solution

STEP 0: Pre-Calculation Summary

Formula Used

Unknown Resistance = Electric Resistance*(Wire Length)/Final Length of Wire
R_x = R*(L_wire)/L_f,wire
This formula uses 4 Variables

Variables Used

Unknown Resistance - (Measured in Ohm) - Unknown Resistance is the opposition to the flow of electric current in a circuit, measured in ohms, and depends on the material and its dimensions.
Electric Resistance - (Measured in Ohm) - Electric resistance is the opposition to the flow of an electric current and is measured in ohms, representing how much a material hinders electric current flow.
Wire Length - (Measured in Meter) - Wire Length is the length of a wire that affects the resistance and conductivity of an electric circuit, influencing the flow of electric current.
Final Length of Wire - (Measured in Meter) - Final Length of Wire is the length of the wire after it has been stretched or compressed due to the flow of electric current.

STEP 1: Convert Input(s) to Base Unit

Electric Resistance: 15 Ohm --> 15 Ohm No Conversion Required
Wire Length: 35 Millimeter --> 0.035 Meter (Check conversion here)
Final Length of Wire: 63.9 Millimeter --> 0.0639 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

R_x = R*(L_wire)/L_f,wire --> 15*(0.035)/0.0639

Evaluating ... ...

R_x = 8.21596244131455

STEP 3: Convert Result to Output's Unit

8.21596244131455 Ohm --> No Conversion Required

FINAL ANSWER

8.21596244131455 ≈ 8.215962 Ohm <-- Unknown Resistance

(Calculation completed in 00.020 seconds)

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Home » Physics » Current Electricity » Basic Physics » Electromagnetism » Voltage and Current Measuring Instruments » Metre Bridge

Credits

Created by Payal Priya

Birsa Institute of Technology (BIT), Sindri

Payal Priya has created this Calculator and 600+ more calculators!

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Go Electric Current = (Potential Gradient*Length)/Electric Resistance

Metre Bridge Formula

Unknown Resistance = Electric Resistance*(Wire Length)/Final Length of Wire
R_x = R*(L_wire)/L_f,wire

What is metre bridge?

A meter bridge is a device used to measure the resistance of an unknown resistor by comparing it with a known resistor. It consists of a bridge circuit with a one-meter-long wire mounted on a base, and a sliding jockey or contact to find the balance point, where the resistances are equal and the bridge is in equilibrium.

How to Calculate Metre Bridge?

Metre Bridge calculator uses Unknown Resistance = Electric Resistance*(Wire Length)/Final Length of Wire to calculate the Unknown Resistance, Metre Bridge formula is defined as a method of measuring unknown resistance in a circuit by balancing two legs of a bridge circuit, one leg having the unknown resistance and the other having a known resistance, to determine the value of the unknown resistance with high accuracy. Unknown Resistance is denoted by R_x symbol.

How to calculate Metre Bridge using this online calculator? To use this online calculator for Metre Bridge, enter Electric Resistance (R), Wire Length (L_wire) & Final Length of Wire (L_f,wire) and hit the calculate button. Here is how the Metre Bridge calculation can be explained with given input values -> 8.215962 = 15*(0.035)/0.0639.

FAQ

What is Metre Bridge?

Metre Bridge formula is defined as a method of measuring unknown resistance in a circuit by balancing two legs of a bridge circuit, one leg having the unknown resistance and the other having a known resistance, to determine the value of the unknown resistance with high accuracy and is represented as R_x = R*(L_wire)/L_f,wire or Unknown Resistance = Electric Resistance*(Wire Length)/Final Length of Wire. Electric resistance is the opposition to the flow of an electric current and is measured in ohms, representing how much a material hinders electric current flow, Wire Length is the length of a wire that affects the resistance and conductivity of an electric circuit, influencing the flow of electric current & Final Length of Wire is the length of the wire after it has been stretched or compressed due to the flow of electric current.

How to calculate Metre Bridge?

Metre Bridge formula is defined as a method of measuring unknown resistance in a circuit by balancing two legs of a bridge circuit, one leg having the unknown resistance and the other having a known resistance, to determine the value of the unknown resistance with high accuracy is calculated using Unknown Resistance = Electric Resistance*(Wire Length)/Final Length of Wire. To calculate Metre Bridge, you need Electric Resistance (R), Wire Length (L_wire) & Final Length of Wire (L_f,wire). With our tool, you need to enter the respective value for Electric Resistance, Wire Length & Final Length of Wire and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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