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Wattmeter Reading Formula

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Wattmeter Reading is the value measured by an instrument that is used for measuring the electric power (or the supply rate of electrical energy) in watts of any given circuit. Check FAQs

W r = \frac{V wp \cdot P i}{V}

W_r - Wattmeter Reading?V_wp - Pressure Coil Voltage?P_i - Iron Loss?V - Potential Difference?

Wattmeter Reading Example

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Here is how the Wattmeter Reading equation looks like with Values.

Here is how the Wattmeter Reading equation looks like with Units.

Here is how the Wattmeter Reading equation looks like.

5.2364 = \frac{10.25 \cdot 9.4}{18.4}

5.2364W = \frac{10.25V \cdot 9.4W}{18.4V}

5.2364 = \frac{10.25 \cdot 9.4}{18.4}

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Wattmeter Reading Solution

Follow our step by step solution on how to calculate Wattmeter Reading?

FIRST Step Consider the formula

W r = \frac{V wp \cdot P i}{V}

Next Step Substitute values of Variables

∴

W r = \frac{10.25V \cdot 9.4W}{18.4V}

Next Step Prepare to Evaluate

∴

W r = \frac{10.25 \cdot 9.4}{18.4}

Next Step Evaluate

∴

W r = 5.23641304347826W

LAST Step Rounding Answer

∴

W r = 5.2364W

Wattmeter Reading Formula Elements

Variables

Wattmeter Reading

Wattmeter Reading is the value measured by an instrument that is used for measuring the electric power (or the supply rate of electrical energy) in watts of any given circuit.

Symbol: W_r

Measurement: PowerUnit: W

Note: Value should be greater than 0.

Formulas to find Wattmeter Reading

Pressure Coil Voltage

Pressure Coil Voltage is typically proportional to the current being measured, generating a magnetic field that interacts with the current-carrying conductor for power measurement.

Symbol: V_wp

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Pressure Coil Voltage

Iron Loss

Iron Loss refers to the electrical power dissipated as heat in the iron core of the instrument. It occurs due to magnetic hysteresis and eddy currents induced in the core material.

Symbol: P_i

Measurement: PowerUnit: W

Note: Value should be greater than 0.

Formulas to find Iron Loss

Potential Difference

Potential Difference is the external work needed to bring a charge from one location to another location in an electric field.

Symbol: V

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Potential Difference

Other formulas in Wattmeter Circuit category

Go Power using Two Wattmeter Method

P t = \sqrt{3} \cdot V ph \cdot I 1 \cdot \cos (Φ)

Go Total Power using phi Angle

P t = 3 \cdot V ph \cdot I ph \cdot \cos (Φ)

Go DC Power (in Voltage Terms)

P t = V t \cdot I - (\frac{{V t}^{2}}{R vm})

Go DC Power (in Current Terms)

P t = V t \cdot I - I^{2} \cdot R a

How to Evaluate Wattmeter Reading?

Wattmeter Reading evaluator uses Wattmeter Reading = (Pressure Coil Voltage*Iron Loss)/(Potential Difference) to evaluate the Wattmeter Reading, The Wattmeter Reading formula is defined as an instrument for measuring the electric power (or the supply rate of electrical energy) in watts of any given circuit. Electromagnetic wattmeters are used for the measurement of utility frequency and audio frequency power. Wattmeter Reading is denoted by W_r symbol.

How to evaluate Wattmeter Reading using this online evaluator? To use this online evaluator for Wattmeter Reading, enter Pressure Coil Voltage (V_wp), Iron Loss (P_i) & Potential Difference (V) and hit the calculate button.

FAQs on Wattmeter Reading

What is the formula to find Wattmeter Reading?

The formula of Wattmeter Reading is expressed as Wattmeter Reading = (Pressure Coil Voltage*Iron Loss)/(Potential Difference). Here is an example- 5.236413 = (10.25*9.4)/(18.4).

How to calculate Wattmeter Reading?

With Pressure Coil Voltage (V_wp), Iron Loss (P_i) & Potential Difference (V) we can find Wattmeter Reading using the formula - Wattmeter Reading = (Pressure Coil Voltage*Iron Loss)/(Potential Difference).

Can the Wattmeter Reading be negative?

No, the Wattmeter Reading, measured in Power cannot be negative.

Which unit is used to measure Wattmeter Reading?

Wattmeter Reading is usually measured using the Watt[W] for Power. Kilowatt[W], Milliwatt[W], Microwatt[W] are the few other units in which Wattmeter Reading can be measured.

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Wattmeter Reading Formula

Wattmeter Reading Example

Wattmeter Reading Solution

Wattmeter Reading Formula Elements

Other formulas in Wattmeter Circuit category

How to Evaluate Wattmeter Reading?

FAQs on Wattmeter Reading

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