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Voltmeter Resistance Formula

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Voltmeter Resistance is the internal resistance of a voltmeter, which is designed to be very high to ensure that the meter draws minimal current from the circuit being measured. Check FAQs

R v = \frac{V r - I \cdot R}{I}

R_v - Voltmeter Resistance?V_r - Voltmeter Range?I - Current Magnitude?R - Resistance?

Voltmeter Resistance Example

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Here is how the Voltmeter Resistance equation looks like with Values.

Here is how the Voltmeter Resistance equation looks like with Units.

Here is how the Voltmeter Resistance equation looks like.

4.297 = \frac{19.32 - 2.96 \cdot 2.23}{2.96}

4.297Ω = \frac{19.32V - 2.96A \cdot 2.23Ω}{2.96A}

4.297 = \frac{19.32 - 2.96 \cdot 2.23}{2.96}

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Voltmeter Resistance Solution

Follow our step by step solution on how to calculate Voltmeter Resistance?

FIRST Step Consider the formula

R v = \frac{V r - I \cdot R}{I}

Next Step Substitute values of Variables

∴

R v = \frac{19.32V - 2.96A \cdot 2.23Ω}{2.96A}

Next Step Prepare to Evaluate

∴

R v = \frac{19.32 - 2.96 \cdot 2.23}{2.96}

Next Step Evaluate

∴

R v = 4.29702702702703Ω

LAST Step Rounding Answer

∴

R v = 4.297Ω

Voltmeter Resistance Formula Elements

Variables

Voltmeter Resistance

Voltmeter Resistance is the internal resistance of a voltmeter, which is designed to be very high to ensure that the meter draws minimal current from the circuit being measured.

Symbol: R_v

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Voltmeter Resistance

Voltmeter Range

Voltmeter Range refers to the range of voltages that a voltmeter is capable of measuring. It represents the minimum and maximum voltage values that the voltmeter can accurately display.

Symbol: V_r

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Voltmeter Range

Current Magnitude

Current Magnitude is the magnitude of the rate of flow of charged particles.

Symbol: I

Measurement: Electric CurrentUnit: A

Note: Value should be greater than 0.

Formulas to find Current Magnitude

Resistance

Resistance is a measure of the opposition to current flow in an electrical circuit.

Symbol: R

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Resistance

Other formulas in Voltmeter Specifications category

Go Voltage of Moving Iron Voltmeter

V = I m \cdot \sqrt{{(R i_m + R S)}^{2} + {(ω \cdot L)}^{2}}

Go Voltage Multiplying Power of Moving Iron Voltmeter

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

Go Deflecting Torque of Electrodynamometer Voltmeter

T = {(\frac{V t}{Z})}^{2} \cdot dM|dθ \cdot \cos (ϕ)

Go Deflection Angle of Electrodynamometer Voltmeter

θ = \frac{{V t}^{2} \cdot dM|dθ \cdot \cos (ϕ)}{k \cdot Z^{2}}

How to Evaluate Voltmeter Resistance?

Voltmeter Resistance evaluator uses Voltmeter Resistance = (Voltmeter Range-Current Magnitude*Resistance)/Current Magnitude to evaluate the Voltmeter Resistance, The Voltmeter Resistance formula is defined as internal resistance of voltmeter.Ideal voltmeter has infinite resistance so no current will flow. This is why voltmeters are placed in parallel to the circuit, not in series. Ammeter is placed in series however and has low resistance. Voltmeter Resistance is denoted by R_v symbol.

How to evaluate Voltmeter Resistance using this online evaluator? To use this online evaluator for Voltmeter Resistance, enter Voltmeter Range (V_r), Current Magnitude (I) & Resistance (R) and hit the calculate button.

FAQs on Voltmeter Resistance

What is the formula to find Voltmeter Resistance?

The formula of Voltmeter Resistance is expressed as Voltmeter Resistance = (Voltmeter Range-Current Magnitude*Resistance)/Current Magnitude. Here is an example- 12.16865 = (19.32-2.96*2.23)/2.96.

How to calculate Voltmeter Resistance?

With Voltmeter Range (V_r), Current Magnitude (I) & Resistance (R) we can find Voltmeter Resistance using the formula - Voltmeter Resistance = (Voltmeter Range-Current Magnitude*Resistance)/Current Magnitude.

Can the Voltmeter Resistance be negative?

No, the Voltmeter Resistance, measured in Electric Resistance cannot be negative.

Which unit is used to measure Voltmeter Resistance?

Voltmeter Resistance is usually measured using the Ohm[Ω] for Electric Resistance. Megohm[Ω], Microhm[Ω], Volt per Ampere[Ω] are the few other units in which Voltmeter Resistance can be measured.

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Voltmeter Resistance Formula

Voltmeter Resistance Example

Voltmeter Resistance Solution

Voltmeter Resistance Formula Elements

Other formulas in Voltmeter Specifications category

How to Evaluate Voltmeter Resistance?

FAQs on Voltmeter Resistance

Variable Name