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m of PMMC based Ammeter Formula

Gom of Moving Iron Ammeter Formula

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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. Check FAQs

m = 1 + (\frac{R m}{R sh})

m - Multiplying Power?R_m - Meter Resistance?R_sh - Shunt Resistance?

m of PMMC based Ammeter Example

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Here is how the m of PMMC based Ammeter equation looks like with Values.

Here is how the m of PMMC based Ammeter equation looks like with Units.

Here is how the m of PMMC based Ammeter equation looks like.

4 = 1 + (\frac{30}{10})

4 = 1 + (\frac{30Ω}{10Ω})

4 = 1 + (\frac{30}{10})

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m of PMMC based Ammeter Solution

Follow our step by step solution on how to calculate m of PMMC based Ammeter?

FIRST Step Consider the formula

m = 1 + (\frac{R m}{R sh})

Next Step Substitute values of Variables

∴

m = 1 + (\frac{30Ω}{10Ω})

Next Step Prepare to Evaluate

∴

m = 1 + (\frac{30}{10})

LAST Step Evaluate

∴

m = 4

m of PMMC based Ammeter Formula Elements

Variables

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.

Symbol: m

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Multiplying Power

Meter Resistance

Meter Resistance refers to the inherent electrical resistance present within a measuring instrument. It is the resistance that the instrument itself presents to the flow of electric current.

Symbol: R_m

Measurement: Electric ResistanceUnit: Ω

Note: Value can be positive or negative.

Formulas to find Meter Resistance

Shunt Resistance

Shunt Resistance refers to a low-resistance pathway connected in parallel with a measuring instrument to divert most of the current and enable accurate measurement.

Symbol: R_sh

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Shunt Resistance

Other Formulas to find Multiplying Power

Go m of Moving Iron Ammeter

m = (\frac{R m}{R sh}) \cdot \sqrt{\frac{1 + {(\frac{ω \cdot L}{R m})}^{2}}{1 + {(\frac{ω \cdot L sh}{R sh})}^{2}}}

Other formulas in Ammeter category

Go Rsh of PMMC based Ammeter

R sh = \frac{I m \cdot R m}{I - I m}

Go Nth resistance in multi-range Ammeter

R n = \frac{R m}{m n - 1}

Go Resistance at switch position n for multi range Ammeter

R sn = \frac{R 1 + R m}{m n}

Go Time Constant of Moving Iron Ammeter

T = \frac{L sh}{R sh}

How to Evaluate m of PMMC based Ammeter?

m of PMMC based Ammeter evaluator uses Multiplying Power = 1+(Meter Resistance/Shunt Resistance) to evaluate 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 evaluate m of PMMC based Ammeter using this online evaluator? To use this online evaluator for m of PMMC based Ammeter, enter Meter Resistance (R_m) & Shunt Resistance (R_sh) and hit the calculate button.

FAQs on m of PMMC based Ammeter

What is the formula to find m of PMMC based Ammeter?

The formula of m of PMMC based Ammeter is expressed as Multiplying Power = 1+(Meter Resistance/Shunt Resistance). Here is an example- 21 = 1+(30/10).

How to calculate m of PMMC based Ammeter?

With Meter Resistance (R_m) & Shunt Resistance (R_sh) we can find m of PMMC based Ammeter using the formula - Multiplying Power = 1+(Meter Resistance/Shunt Resistance).

What are the other ways to Calculate Multiplying Power?

Here are the different ways to Calculate Multiplying Power-

Multiplying Power=(Meter Resistance/Shunt Resistance)*sqrt((1+((Angular Frequency*Inductance)/Meter Resistance)^2)/(1+((Angular Frequency*Shunt Inductance)/Shunt Resistance)^2))

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