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Value of R1 Solution

STEP 0: Pre-Calculation Summary
Formula Used
r1_s = Resistance (half)-((Current (fs)*Rm*Resistance (half))/Voltage)
R1 = Rh-((Ifs*Rₘ*Rh)/E)
This formula uses 4 Variables
Variables Used
Resistance (half) - Resistance (half) is the value of the amount of effective resistance at half scale reading (Measured in Ohm)
Current (fs) - Current (fs) is the measure of the full scale current flowing through the meter (Measured in Ampere)
Rm - Rm is the internal resistance of the coil in PMMC instrument (Measured in Ohm)
Voltage - Voltage is the value of the voltage applied in the ohmmeter. (Measured in Volt)
STEP 1: Convert Input(s) to Base Unit
Resistance (half): 5 Ohm --> 5 Ohm No Conversion Required
Current (fs): 0.1 Ampere --> 0.1 Ampere No Conversion Required
Rm: 5 Ohm --> 5 Ohm No Conversion Required
Voltage: 15 Volt --> 15 Volt No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
R1 = Rh-((Ifs*Rₘ*Rh)/E) --> 5-((0.1*5*5)/15)
Evaluating ... ...
R1 = 4.83333333333333
STEP 3: Convert Result to Output's Unit
4.83333333333333 Ohm --> No Conversion Required
FINAL ANSWER
4.83333333333333 Ohm <-- Resistance 1
(Calculation completed in 00.016 seconds)

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r_series = (RMS value*Sensitivity (ac))-Rm-R diode Go
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r_series = (RMS value*Sensitivity)-Rm-(2*R diode) Go
Rs for DC Operation (Half Wave)
r_series = (RMS value*Sensitivity)-Rm-R diode Go
Rsh of PMMC based Ammeter
r_sh = (Im*Rm)/(Current (measured)-Im) Go
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DC Meter Sensitivity
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Value of R1 Formula

r1_s = Resistance (half)-((Current (fs)*Rm*Resistance (half))/Voltage)
R1 = Rh-((Ifs*Rₘ*Rh)/E)

How to mark zero reading?

To mark zero reading on the scale, the terminals are shorted and Rx is made zero. Now, maximum current is flowing in the circuit and R2 is adjusted till D'Arsonal movement indicates full-scale current.

How to Calculate Value of R1?

Value of R1 calculator uses r1_s = Resistance (half)-((Current (fs)*Rm*Resistance (half))/Voltage) to calculate the Resistance 1, The Value of R1 is directly dependent on the value of resistance at half scale. It is the current limiting resistance. Resistance 1 and is denoted by R1 symbol.

How to calculate Value of R1 using this online calculator? To use this online calculator for Value of R1, enter Resistance (half) (Rh), Current (fs) (Ifs), Rm (Rₘ) and Voltage (E) and hit the calculate button. Here is how the Value of R1 calculation can be explained with given input values -> 4.833333 = 5-((0.1*5*5)/15).

FAQ

What is Value of R1?
The Value of R1 is directly dependent on the value of resistance at half scale. It is the current limiting resistance and is represented as R1 = Rh-((Ifs*Rₘ*Rh)/E) or r1_s = Resistance (half)-((Current (fs)*Rm*Resistance (half))/Voltage). Resistance (half) is the value of the amount of effective resistance at half scale reading, Current (fs) is the measure of the full scale current flowing through the meter, Rm is the internal resistance of the coil in PMMC instrument and Voltage is the value of the voltage applied in the ohmmeter.
How to calculate Value of R1?
The Value of R1 is directly dependent on the value of resistance at half scale. It is the current limiting resistance is calculated using r1_s = Resistance (half)-((Current (fs)*Rm*Resistance (half))/Voltage). To calculate Value of R1, you need Resistance (half) (Rh), Current (fs) (Ifs), Rm (Rₘ) and Voltage (E). With our tool, you need to enter the respective value for Resistance (half), Current (fs), Rm and Voltage 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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