Rsh of PMMC based Ammeter Calculator

✖Full Scale Deflection Current is the maximum current that an instrument can measure, causing its pointer or display to reach the highest position on its scale.ⓘ Full Scale Deflection Current [I_m]			+10% -10%
✖Internal Resistance of Meter Movement refers to the opposition offered by the device's coil to the flow of electric current, affecting its sensitivity and accuracy in measuring electrical quantities.ⓘ Internal Resistance of Meter Movement [R_m]			+10% -10%
✖Current for pmmc is the current to be measured in the coil.ⓘ Current [I]			+10% -10%

✖Resistance of Shunt refers to a low-resistance pathway connected in parallel with a measuring instrument, such as an ammeter, to divert most of the current and enable accurate measurement.ⓘ Rsh of PMMC based Ammeter [R_sh]

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Formula

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Rsh of PMMC based Ammeter

Formula

`"R"_{"sh"} = ("I"_{"m"}*"R"_{"m"})/("I"-"I"_{"m"})`

Example

`"0.289474Ω"=("1.25A"*"5.5Ω")/("25A"-"1.25A")`

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Rsh of PMMC based Ammeter Solution

STEP 0: Pre-Calculation Summary

Formula Used

Resistance of Shunt = (Full Scale Deflection Current*Internal Resistance of Meter Movement)/(Current-Full Scale Deflection Current)
R_sh = (I_m*R_m)/(I-I_m)
This formula uses 4 Variables

Variables Used

Resistance of Shunt - (Measured in Ohm) - Resistance of Shunt refers to a low-resistance pathway connected in parallel with a measuring instrument, such as an ammeter, to divert most of the current and enable accurate measurement.
Full Scale Deflection Current - (Measured in Ampere) - Full Scale Deflection Current is the maximum current that an instrument can measure, causing its pointer or display to reach the highest position on its scale.
Internal Resistance of Meter Movement - (Measured in Ohm) - Internal Resistance of Meter Movement refers to the opposition offered by the device's coil to the flow of electric current, affecting its sensitivity and accuracy in measuring electrical quantities.
Current - (Measured in Ampere) - Current for pmmc is the current to be measured in the coil.

STEP 1: Convert Input(s) to Base Unit

Full Scale Deflection Current: 1.25 Ampere --> 1.25 Ampere No Conversion Required
Internal Resistance of Meter Movement: 5.5 Ohm --> 5.5 Ohm No Conversion Required
Current: 25 Ampere --> 25 Ampere No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

R_sh = (I_m*R_m)/(I-I_m) --> (1.25*5.5)/(25-1.25)

Evaluating ... ...

R_sh = 0.289473684210526

STEP 3: Convert Result to Output's Unit

0.289473684210526 Ohm --> No Conversion Required

FINAL ANSWER

0.289473684210526 ≈ 0.289474 Ohm <-- Resistance of Shunt

(Calculation completed in 00.014 seconds)

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Created by Nikita Suryawanshi

Vellore Institute of Technology (VIT), Vellore

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< 9 Permanent Magnet Moving Coil Calculators

Angle of deflection of PMMC

Go Angle of Deflection in Magnetic Coil = (Number of Turns of Magnetic Coil*Flux Density of Coil*Length*Width*Current in Coil)/Spring Constant

Deflecting torque of PMMC instrument

Go Deflecting Torque = Number of Turns of Magnetic Coil*Flux Density of Coil*Length*Width*Current in Coil

Rsh of PMMC based Ammeter

Go Resistance of Shunt = (Full Scale Deflection Current*Internal Resistance of Meter Movement)/(Current-Full Scale Deflection Current)

Resistance at switch position 'n' for multi range Ammeter

Go Resistance at nth Switch Position = (Resistance at Switch Position 1+Internal Resistance of Meter Movement)/Nth Multiplying Factor

Nth resistance in multi-range voltmeter

Go Nth Multiplier Resistance = (Nth Multiplying Factor-(n-1)th Multiplying Factor)*Internal Resistance of Meter Movement

Rs of PMMC based voltmeter

Go Multiplier Resistance = (Voltage/Full Scale Deflection Current)-Internal Resistance of Meter Movement

Nth resistance in multi-range Ammeter

Go Nth Multiplier Resistance = Internal Resistance of Meter Movement/(Nth Multiplying Factor-1)

m of PMMC based voltmeter

Go Multiplying Power = 1+(Multiplier Resistance/Internal Resistance of Meter Movement)

m of PMMC based Ammeter

Go Multiplying Power = (1+Internal Resistance of Meter Movement)/Resistance of Shunt

Rsh of PMMC based Ammeter Formula

Resistance of Shunt = (Full Scale Deflection Current*Internal Resistance of Meter Movement)/(Current-Full Scale Deflection Current)
R_sh = (I_m*R_m)/(I-I_m)

What is PMMC?

PMMC stands for Permanent Magnet Moving Coil. The instruments which use the permanent magnet for creating the stationary magnetic field between which the coil moves are known as permanent magnet moving coil or PMMC instruments.

How to Calculate Rsh of PMMC based Ammeter?

Rsh of PMMC based Ammeter calculator uses Resistance of Shunt = (Full Scale Deflection Current*Internal Resistance of Meter Movement)/(Current-Full Scale Deflection Current) to calculate the Resistance of Shunt, The Rsh of PMMC based Ammeter formula is used to calculate the shunt resistance of the coil and find the current to be measured. Resistance of Shunt is denoted by R_sh symbol.

How to calculate Rsh of PMMC based Ammeter using this online calculator? To use this online calculator for Rsh of PMMC based Ammeter, enter Full Scale Deflection Current (I_m), Internal Resistance of Meter Movement (R_m) & Current (I) and hit the calculate button. Here is how the Rsh of PMMC based Ammeter calculation can be explained with given input values -> 0.289474 = (1.25*5.5)/(25-1.25).

FAQ

What is Rsh of PMMC based Ammeter?

The Rsh of PMMC based Ammeter formula is used to calculate the shunt resistance of the coil and find the current to be measured and is represented as R_sh = (I_m*R_m)/(I-I_m) or Resistance of Shunt = (Full Scale Deflection Current*Internal Resistance of Meter Movement)/(Current-Full Scale Deflection Current). Full Scale Deflection Current is the maximum current that an instrument can measure, causing its pointer or display to reach the highest position on its scale, Internal Resistance of Meter Movement refers to the opposition offered by the device's coil to the flow of electric current, affecting its sensitivity and accuracy in measuring electrical quantities & Current for pmmc is the current to be measured in the coil.

How to calculate Rsh of PMMC based Ammeter?

The Rsh of PMMC based Ammeter formula is used to calculate the shunt resistance of the coil and find the current to be measured is calculated using Resistance of Shunt = (Full Scale Deflection Current*Internal Resistance of Meter Movement)/(Current-Full Scale Deflection Current). To calculate Rsh of PMMC based Ammeter, you need Full Scale Deflection Current (I_m), Internal Resistance of Meter Movement (R_m) & Current (I). With our tool, you need to enter the respective value for Full Scale Deflection Current, Internal Resistance of Meter Movement & Current 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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