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Metre Bridge Formula

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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. Check FAQs

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

R_x - Unknown Resistance?R - Electric Resistance?L_wire - Wire Length?L_f,wire - Final Length of Wire?

Metre Bridge Example

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Here is how the Metre Bridge equation looks like with Values.

Here is how the Metre Bridge equation looks like with Units.

Here is how the Metre Bridge equation looks like.

8.216 = 15 \cdot \frac{35}{63.9}

8.216Ω = 15Ω \cdot \frac{35mm}{63.9mm}

8.216 = 15 \cdot \frac{35}{63.9}

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Metre Bridge Solution

Follow our step by step solution on how to calculate Metre Bridge?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

R x = 15Ω \cdot \frac{35mm}{63.9mm}

Next Step Convert Units

∴

R x = 15Ω \cdot \frac{0.035m}{0.0639m}

Next Step Prepare to Evaluate

∴

R x = 15 \cdot \frac{0.035}{0.0639}

Next Step Evaluate

∴

R x = 8.21596244131455Ω

LAST Step Rounding Answer

∴

R x = 8.216Ω

Metre Bridge Formula Elements

Variables

Unknown Resistance

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.

Symbol: R_x

Measurement: Electric ResistanceUnit: Ω

Note: Value can be positive or negative.

Formulas to find Unknown Resistance

Electric Resistance

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.

Symbol: R

Measurement: Electric ResistanceUnit: Ω

Note: Value can be positive or negative.

Formulas to find Electric Resistance

Wire Length

Wire Length is the length of a wire that affects the resistance and conductivity of an electric circuit, influencing the flow of electric current.

Symbol: L_wire

Measurement: LengthUnit: mm

Note: Value can be positive or negative.

Formulas to find Wire Length

Final Length of Wire

Final Length of Wire is the length of the wire after it has been stretched or compressed due to the flow of electric current.

Symbol: L_f,wire

Measurement: LengthUnit: mm

Note: Value can be positive or negative.

Formulas to find Final Length of Wire

Other formulas in Voltage and Current Measuring Instruments category

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Go Current in Potentiometer

I = \frac{x \cdot L}{R}

Go Ohm's Law

V = I \cdot R

How to Evaluate Metre Bridge?

Metre Bridge evaluator uses Unknown Resistance = Electric Resistance*(Wire Length)/Final Length of Wire to evaluate 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 evaluate Metre Bridge using this online evaluator? To use this online evaluator for Metre Bridge, enter Electric Resistance (R), Wire Length (L_wire) & Final Length of Wire (L_f,wire) and hit the calculate button.

FAQs on Metre Bridge

What is the formula to find Metre Bridge?

The formula of Metre Bridge is expressed as Unknown Resistance = Electric Resistance*(Wire Length)/Final Length of Wire. Here is an example- 8.215962 = 15*(0.035)/0.0639.

How to calculate Metre Bridge?

With Electric Resistance (R), Wire Length (L_wire) & Final Length of Wire (L_f,wire) we can find Metre Bridge using the formula - Unknown Resistance = Electric Resistance*(Wire Length)/Final Length of Wire.

Can the Metre Bridge be negative?

Yes, the Metre Bridge, measured in Electric Resistance can be negative.

Which unit is used to measure Metre Bridge?

Metre Bridge is usually measured using the Ohm[Ω] for Electric Resistance. Megohm[Ω], Microhm[Ω], Volt per Ampere[Ω] are the few other units in which Metre Bridge can be measured.

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Metre Bridge Formula

Metre Bridge Example

Metre Bridge Solution

Metre Bridge Formula Elements

Other formulas in Voltage and Current Measuring Instruments category

How to Evaluate Metre Bridge?

FAQs on Metre Bridge

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