DC Power (in Voltage Terms) Solution

STEP 0: Pre-Calculation Summary
Formula Used
Total Power = Total Voltage*Total Current-(Total Voltage^2/Voltmeter Resistance)
Pt = Vt*I-(Vt^2/Rvm)
This formula uses 4 Variables
Variables Used
Total Power - (Measured in Watt) - Total Power refers to the sum of the electrical power consumed or generated by the load being measured in a wattmeter.
Total Voltage - (Measured in Volt) - Total Voltage refers to the combined electrical voltage across all phases of a multi-phase electrical system.
Total Current - (Measured in Ampere) - Total Current is the sum of the current flowing through the load and pressure coil in a wattmeter circuit.
Voltmeter Resistance - (Measured in Ohm) - Voltmeter Resistance refers to the electrical resistance of the coil or circuitry used to measure voltage across the load.
STEP 1: Convert Input(s) to Base Unit
Total Voltage: 10 Volt --> 10 Volt No Conversion Required
Total Current: 0.5 Ampere --> 0.5 Ampere No Conversion Required
Voltmeter Resistance: 40 Ohm --> 40 Ohm No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Pt = Vt*I-(Vt^2/Rvm) --> 10*0.5-(10^2/40)
Evaluating ... ...
Pt = 2.5
STEP 3: Convert Result to Output's Unit
2.5 Watt --> No Conversion Required
FINAL ANSWER
2.5 Watt <-- Total Power
(Calculation completed in 00.004 seconds)

Credits

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Created by Nikita Suryawanshi
Vellore Institute of Technology (VIT), Vellore
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15 Wattmeter Circuit Calculators

Deflecting Torque in Electrodynamic Wattmeter
​ Go Deflecting Torque = (Total Voltage*Total Current*cos(Phase Angle)*Inductance Change with Deflection Angle)/Pressure Coil Resistance
Deflection Angle in Electrodynamic Wattmeter
​ Go Deflection Angle = (Total Current*Pressure Coil Current*cos(Phase Angle)*Inductance Change with Deflection Angle)/(Spring Constant)
Total Power for Three Phase Wattmeter
​ Go Total Power = (One Phase Voltage*One Phase Current)+(Two Phase Voltage*Two Phase Current)+(Three Phase Voltage*Three Phase Current)
Resistance of Watt-meter pressure Coil
​ Go Pressure Coil Resistance = (Voltage Induced in Secondary Winding 2-(Pressure Coil Current*Secondary Winding 1 Coil Resistance))/Pressure Coil Current
Resistance of coil S1
​ Go Secondary Winding 1 Coil Resistance = (Voltage Induced in Secondary Winding 2-(Pressure Coil Current*Pressure Coil Resistance))/Pressure Coil Current
Total copper loss in secondary winding circuit
​ Go Secondary Winding Copper Loss = (Voltage Induced in Secondary Winding 2^2)/(Secondary Winding 1 Coil Resistance+Pressure Coil Resistance)
Power using Two Wattmeter Method
​ Go Total Power = sqrt(3)*Total Phase Voltage*One Phase Current*cos(Phase Angle)
Current in pressure coil circuit
​ Go Pressure Coil Current = Voltage Induced in Secondary Winding 2/(Pressure Coil Resistance+Secondary Winding 1 Coil Resistance)
Voltage Induced in S2
​ Go Voltage Induced in Secondary Winding 2 = Pressure Coil Current*(Pressure Coil Resistance+Secondary Winding 1 Coil Resistance)
DC Power (in Voltage Terms)
​ Go Total Power = Total Voltage*Total Current-(Total Voltage^2/Voltmeter Resistance)
DC Power (in Current Terms)
​ Go Total Power = Total Voltage*Total Current-Total Current^2*Ammeter Resistance
AC Power
​ Go Instantaneous AC Power = Total Voltage*Current RMS Value*cos(Phase Angle)
Total Power using phi Angle
​ Go Total Power = 3*Total Phase Voltage*Total Phase Current*cos(Phase Angle)
Wattmeter Reading
​ Go Wattmeter Reading = (Pressure Coil Voltage*Iron Loss)/(Potential Difference)
Voltage applied to wattmeter pressure coil
​ Go Pressure Coil Voltage = (Wattmeter Reading*Potential Difference)/Iron Loss

DC Power (in Voltage Terms) Formula

Total Power = Total Voltage*Total Current-(Total Voltage^2/Voltmeter Resistance)
Pt = Vt*I-(Vt^2/Rvm)

How to calculate load power?

The power through the load is given by the difference between the power indicated by the instruments and the power loss in the voltmeter. The ammeter indicates the current flowing through the load as well as the voltmeter.

How to Calculate DC Power (in Voltage Terms)?

DC Power (in Voltage Terms) calculator uses Total Power = Total Voltage*Total Current-(Total Voltage^2/Voltmeter Resistance) to calculate the Total Power, The DC Power (in Voltage Terms) formula is used to calculate the power of the load on a circuit that employs a voltmeter and an ammeter. Total Power is denoted by Pt symbol.

How to calculate DC Power (in Voltage Terms) using this online calculator? To use this online calculator for DC Power (in Voltage Terms), enter Total Voltage (Vt), Total Current (I) & Voltmeter Resistance (Rvm) and hit the calculate button. Here is how the DC Power (in Voltage Terms) calculation can be explained with given input values -> 2.5 = 10*0.5-(10^2/40).

FAQ

What is DC Power (in Voltage Terms)?
The DC Power (in Voltage Terms) formula is used to calculate the power of the load on a circuit that employs a voltmeter and an ammeter and is represented as Pt = Vt*I-(Vt^2/Rvm) or Total Power = Total Voltage*Total Current-(Total Voltage^2/Voltmeter Resistance). Total Voltage refers to the combined electrical voltage across all phases of a multi-phase electrical system, Total Current is the sum of the current flowing through the load and pressure coil in a wattmeter circuit & Voltmeter Resistance refers to the electrical resistance of the coil or circuitry used to measure voltage across the load.
How to calculate DC Power (in Voltage Terms)?
The DC Power (in Voltage Terms) formula is used to calculate the power of the load on a circuit that employs a voltmeter and an ammeter is calculated using Total Power = Total Voltage*Total Current-(Total Voltage^2/Voltmeter Resistance). To calculate DC Power (in Voltage Terms), you need Total Voltage (Vt), Total Current (I) & Voltmeter Resistance (Rvm). With our tool, you need to enter the respective value for Total Voltage, Total Current & Voltmeter Resistance 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 Total Power?
In this formula, Total Power uses Total Voltage, Total Current & Voltmeter Resistance. We can use 4 other way(s) to calculate the same, which is/are as follows -
  • Total Power = sqrt(3)*Total Phase Voltage*One Phase Current*cos(Phase Angle)
  • Total Power = 3*Total Phase Voltage*Total Phase Current*cos(Phase Angle)
  • Total Power = Total Voltage*Total Current-Total Current^2*Ammeter Resistance
  • Total Power = (One Phase Voltage*One Phase Current)+(Two Phase Voltage*Two Phase Current)+(Three Phase Voltage*Three Phase Current)
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