m of PMMC based Ammeter Calculator

✖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%
✖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.ⓘ Resistance of Shunt [R_sh]			+10% -10%

✖Multiplying Power refers to the mechanism by which shunt resistors are used to divert most of the current, allowing the meter to measure higher currents accurately.ⓘ m of PMMC based Ammeter [m]

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Formula

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m of PMMC based Ammeter

Formula

`"m" = (1+"R"_{"m"})/"R"_{"sh"}`

Example

`"0.464286"=(1+"5.5Ω")/"14Ω"`

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m of PMMC based Ammeter Solution

STEP 0: Pre-Calculation Summary

Formula Used

Multiplying Power = (1+Internal Resistance of Meter Movement)/Resistance of Shunt
m = (1+R_m)/R_sh
This formula uses 3 Variables

Variables Used

Multiplying Power - Multiplying Power refers to the mechanism by which shunt resistors are used to divert most of the current, allowing the meter to measure higher currents accurately.
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.
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.

STEP 1: Convert Input(s) to Base Unit

Internal Resistance of Meter Movement: 5.5 Ohm --> 5.5 Ohm No Conversion Required
Resistance of Shunt: 14 Ohm --> 14 Ohm No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

m = (1+R_m)/R_sh --> (1+5.5)/14

Evaluating ... ...

m = 0.464285714285714

STEP 3: Convert Result to Output's Unit

0.464285714285714 --> No Conversion Required

FINAL ANSWER

0.464285714285714 ≈ 0.464286 <-- Multiplying Power

(Calculation completed in 00.004 seconds)

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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

m of PMMC based Ammeter Formula

Multiplying Power = (1+Internal Resistance of Meter Movement)/Resistance of Shunt
m = (1+R_m)/R_sh

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 a permanent magnet moving coil or PMMC instruments.

How to Calculate m of PMMC based Ammeter?

m of PMMC based Ammeter calculator uses Multiplying Power = (1+Internal Resistance of Meter Movement)/Resistance of Shunt to calculate the Multiplying Power, The m of PMMC based ammeter formula is defined as the multiplying power of the PMMC. It can also be calculated by (I/Iₘ). Multiplying Power is denoted by m symbol.

How to calculate m of PMMC based Ammeter using this online calculator? To use this online calculator for m of PMMC based Ammeter, enter Internal Resistance of Meter Movement (R_m) & Resistance of Shunt (R_sh) and hit the calculate button. Here is how the m of PMMC based Ammeter calculation can be explained with given input values -> 853.6906 = (1+5.5)/14.

FAQ

What is m of PMMC based Ammeter?

The m of PMMC based ammeter formula is defined as the multiplying power of the PMMC. It can also be calculated by (I/Iₘ) and is represented as m = (1+R_m)/R_sh or Multiplying Power = (1+Internal Resistance of Meter Movement)/Resistance of Shunt. 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 & 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.

How to calculate m of PMMC based Ammeter?

The m of PMMC based ammeter formula is defined as the multiplying power of the PMMC. It can also be calculated by (I/Iₘ) is calculated using Multiplying Power = (1+Internal Resistance of Meter Movement)/Resistance of Shunt. To calculate m of PMMC based Ammeter, you need Internal Resistance of Meter Movement (R_m) & Resistance of Shunt (R_sh). With our tool, you need to enter the respective value for Internal Resistance of Meter Movement & Resistance of Shunt and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Multiplying Power?

In this formula, Multiplying Power uses Internal Resistance of Meter Movement & Resistance of Shunt. We can use 1 other way(s) to calculate the same, which is/are as follows -

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

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