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Time Constant of LR Circuit Formula

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Time Constant of L-R Circuit is the inductance of circuit per unit resistance. Check FAQs

τ = \frac{L}{R}

τ - Time Constant of L-R Circuit?L - Inductance?R - Resistance?

Time Constant of LR Circuit Example

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Here is how the Time Constant of LR Circuit equation looks like with Values.

Here is how the Time Constant of LR Circuit equation looks like with Units.

Here is how the Time Constant of LR Circuit equation looks like.

0.5644 = \frac{5.7}{10.1}

0.5644s = \frac{5.7H}{10.1Ω}

0.5644 = \frac{5.7}{10.1}

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Time Constant of LR Circuit Solution

Follow our step by step solution on how to calculate Time Constant of LR Circuit?

FIRST Step Consider the formula

τ = \frac{L}{R}

Next Step Substitute values of Variables

∴

τ = \frac{5.7H}{10.1Ω}

Next Step Prepare to Evaluate

∴

τ = \frac{5.7}{10.1}

Next Step Evaluate

∴

τ = 0.564356435643564s

LAST Step Rounding Answer

∴

τ = 0.5644s

Time Constant of LR Circuit Formula Elements

Variables

Time Constant of L-R Circuit

Time Constant of L-R Circuit is the inductance of circuit per unit resistance.

Symbol: τ

Measurement: TimeUnit: s

Note: Value can be positive or negative.

Formulas to find Time Constant of L-R Circuit

Inductance

Inductance is the tendency of an electric conductor to oppose a change in the electric current flowing through it.

Symbol: L

Measurement: InductanceUnit: H

Note: Value should be greater than 0.

Formulas to find Inductance

Resistance

Resistance is a measure of the opposition to current flow in an electrical circuit. Its S.I unit is ohm.

Symbol: R

Measurement: Electric ResistanceUnit: Ω

Note: Value can be positive or negative.

Formulas to find Resistance

Other formulas in Basics of Electromagentic Induction category

Go Capacitive Reactance

X c = \frac{1}{ω \cdot C}

Go Current Value for Alternating Current

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

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 Time Constant of LR Circuit?

Time Constant of LR Circuit evaluator uses Time Constant of L-R Circuit = Inductance/Resistance to evaluate the Time Constant of L-R Circuit, The Time Constant of LR Circuit formula is defined as the time required for the current flowing in the LR series circuit to reach its maximum steady state value is equivalent to about 5 time constants or 5τ. Time Constant of L-R Circuit is denoted by τ symbol.

How to evaluate Time Constant of LR Circuit using this online evaluator? To use this online evaluator for Time Constant of LR Circuit, enter Inductance (L) & Resistance (R) and hit the calculate button.

FAQs on Time Constant of LR Circuit

What is the formula to find Time Constant of LR Circuit?

The formula of Time Constant of LR Circuit is expressed as Time Constant of L-R Circuit = Inductance/Resistance. Here is an example- 0.564356 = 5.7/10.1.

How to calculate Time Constant of LR Circuit?

With Inductance (L) & Resistance (R) we can find Time Constant of LR Circuit using the formula - Time Constant of L-R Circuit = Inductance/Resistance.

Can the Time Constant of LR Circuit be negative?

Yes, the Time Constant of LR Circuit, measured in Time can be negative.

Which unit is used to measure Time Constant of LR Circuit?

Time Constant of LR Circuit is usually measured using the Second[s] for Time. Millisecond[s], Microsecond[s], Nanosecond[s] are the few other units in which Time Constant of LR Circuit can be measured.

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