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Motional EMF Formula

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Electromotive force is the capability of the system to make the charge flow. Check FAQs

ε = B \cdot L emf \cdot v

ε - Electromotive Force?B - Magnetic Field?L_emf - Length?v - Velocity?

Motional EMF Example

With values

With units

Only example

Here is how the Motional EMF equation looks like with Values.

Here is how the Motional EMF equation looks like with Units.

Here is how the Motional EMF equation looks like.

45 = 2.5 \cdot 3 \cdot 6

45V = 2.5Wb/m² \cdot 3m \cdot 6m/s

45 = 2.5 \cdot 3 \cdot 6

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Motional EMF Solution

Follow our step by step solution on how to calculate Motional EMF?

FIRST Step Consider the formula

ε = B \cdot L emf \cdot v

Next Step Substitute values of Variables

∴

ε = 2.5Wb/m² \cdot 3m \cdot 6m/s

Next Step Convert Units

∴

ε = 2.5T \cdot 3m \cdot 6m/s

Next Step Prepare to Evaluate

∴

ε = 2.5 \cdot 3 \cdot 6

LAST Step Evaluate

∴

ε = 45V

Motional EMF Formula Elements

Variables

Electromotive Force

Electromotive force is the capability of the system to make the charge flow.

Symbol: ε

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Electromotive Force

Magnetic Field

Magnetic fields are produced by electric currents, which can be macroscopic currents in wires, or microscopic currents associated with electrons in atomic orbits.

Symbol: B

Measurement: Magnetic FieldUnit: Wb/m²

Note: Value can be positive or negative.

Formulas to find Magnetic Field

Length

Length is the measurement or extent of something from end to end.

Symbol: L_emf

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Length

Velocity

Velocity is a vector quantity (it has both magnitude and direction) and is the rate of change of the position of an object with respect to time.

Symbol: v

Measurement: SpeedUnit: m/s

Note: Value should be greater than 0.

Formulas to find Velocity

Other formulas in Basics of Electromagentic Induction category

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X c = \frac{1}{ω \cdot C}

Go Current Value for Alternating Current

i p = I o \cdot \sin (ω f \cdot t + φ)

Go Decay of Current in LR circuit

I decay = i p \cdot e^{- \frac{T w}{\frac{L}{R}}}

Go EMF Induced in Rotating Coil

e = n \cdot A \cdot B \cdot ω \cdot \sin (ω \cdot t)

How to Evaluate Motional EMF?

Motional EMF evaluator uses Electromotive Force = Magnetic Field*Length*Velocity to evaluate the Electromotive Force, The Motional EMF formula is defined as the electromotive force in terms of magnetic field, length of the object moving at speed v relative to the strength of the magnetic field B. Electromotive Force is denoted by ε symbol.

How to evaluate Motional EMF using this online evaluator? To use this online evaluator for Motional EMF, enter Magnetic Field (B), Length (L_emf) & Velocity (v) and hit the calculate button.

FAQs on Motional EMF

What is the formula to find Motional EMF?

The formula of Motional EMF is expressed as Electromotive Force = Magnetic Field*Length*Velocity. Here is an example- 45 = 2.5*3*6.

How to calculate Motional EMF?

With Magnetic Field (B), Length (L_emf) & Velocity (v) we can find Motional EMF using the formula - Electromotive Force = Magnetic Field*Length*Velocity.

Can the Motional EMF be negative?

Yes, the Motional EMF, measured in Electric Potential can be negative.

Which unit is used to measure Motional EMF?

Motional EMF is usually measured using the Volt[V] for Electric Potential. Millivolt[V], Microvolt[V], Nanovolt[V] are the few other units in which Motional EMF can be measured.

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