Rs of PMMC based voltmeter Solution

STEP 0: Pre-Calculation Summary
Formula Used
RS PMMC = (Voltage (full range)/Im)-RM_PERMANENT_MAGNET
RSPMMC = (V/Iₘ)-Rmi
This formula uses 4 Variables
Variables Used
RS PMMC - (Measured in Ohm) - RS PMMC is the value of series resistance attached to the pmmc-based voltmeter.
Voltage (full range) - (Measured in Volt) - Voltage (full range) is the full range voltage of the pmmc based voltmeter.
Im - (Measured in Ampere) - Im is the full scale deflection of the coil.
RM_PERMANENT_MAGNET - (Measured in Ohm) - RM_PERMANENT_MAGNET is the internal resistance of the coil in PMMC instrument.
STEP 1: Convert Input(s) to Base Unit
Voltage (full range): 505 Volt --> 505 Volt No Conversion Required
Im: 0.034562 Ampere --> 0.034562 Ampere No Conversion Required
RM_PERMANENT_MAGNET: 5.5 Ohm --> 5.5 Ohm No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
RSPMMC = (V/Iₘ)-Rmi --> (505/0.034562)-5.5
Evaluating ... ...
RSPMMC = 14605.9229500608
STEP 3: Convert Result to Output's Unit
14605.9229500608 Ohm --> No Conversion Required
FINAL ANSWER
14605.9229500608 14605.92 Ohm <-- RS PMMC
(Calculation completed in 00.004 seconds)

Credits

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*Flux Density of Coil*Length*Width*Current in Coil)/K (spring)
Deflecting torque of PMMC instrument
Go Torque Permanent Magnet = Number of Turns*Flux Density of Coil*Length*Width*Current in Coil
Rsh of PMMC based Ammeter
Go Rsh PMMC = (Im*RM_PERMANENT_MAGNET)/(Current (measured)-Im)
Rs of PMMC based voltmeter
Go RS PMMC = (Voltage (full range)/Im)-RM_PERMANENT_MAGNET
Resistance at switch position 'n' for multi range Ammeter
Go Nth Resistance At Switch Position = (Rsh1+Rm)/Nth m
Nth resistance in multi-range voltmeter
Go Nth resistance = (Nth m-(n-1)th m)*Rm
m of PMMC based Ammeter
Go Multiplying Power 1 = (1+RM_PERMANENT_MAGNET)/Rsh
m of PMMC based voltmeter
Go Multiplying Power 2 = 1+(RS/RM_PERMANENT_MAGNET)
Nth resistance in multi-range Ammeter
Go Nth resistance = Rm/(Nth m-1)

Rs of PMMC based voltmeter Formula

RS PMMC = (Voltage (full range)/Im)-RM_PERMANENT_MAGNET
RSPMMC = (V/Iₘ)-Rmi

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.

What is Voltage Multiplier?

Voltmeter multipliers are PMMC based voltmeters that have a resistance connected in series. It limits the current through the meter and does not allow the value to exceed set value for a full-scale deflection. This protects the meter from damage.

How to Calculate Rs of PMMC based voltmeter?

Rs of PMMC based voltmeter calculator uses RS PMMC = (Voltage (full range)/Im)-RM_PERMANENT_MAGNET to calculate the RS PMMC, The Rs of PMMC based voltmeter is the series resistance connected to the pmmc instrument to convert it to a working voltmeter. RS PMMC is denoted by RSPMMC symbol.

How to calculate Rs of PMMC based voltmeter using this online calculator? To use this online calculator for Rs of PMMC based voltmeter, enter Voltage (full range) (V), Im (Iₘ) & RM_PERMANENT_MAGNET (Rmi) and hit the calculate button. Here is how the Rs of PMMC based voltmeter calculation can be explained with given input values -> 14605.92 = (505/0.034562)-5.5.

FAQ

What is Rs of PMMC based voltmeter?
The Rs of PMMC based voltmeter is the series resistance connected to the pmmc instrument to convert it to a working voltmeter and is represented as RSPMMC = (V/Iₘ)-Rmi or RS PMMC = (Voltage (full range)/Im)-RM_PERMANENT_MAGNET. Voltage (full range) is the full range voltage of the pmmc based voltmeter, Im is the full scale deflection of the coil & RM_PERMANENT_MAGNET is the internal resistance of the coil in PMMC instrument.
How to calculate Rs of PMMC based voltmeter?
The Rs of PMMC based voltmeter is the series resistance connected to the pmmc instrument to convert it to a working voltmeter is calculated using RS PMMC = (Voltage (full range)/Im)-RM_PERMANENT_MAGNET. To calculate Rs of PMMC based voltmeter, you need Voltage (full range) (V), Im (Iₘ) & RM_PERMANENT_MAGNET (Rmi). With our tool, you need to enter the respective value for Voltage (full range), Im & RM_PERMANENT_MAGNET 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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