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Time Constant for RC Circuit Formula

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Time constant is the response representing the elapsed time required for the system response to decay to zero if the system had continued to decay at the initial rate. Check FAQs

τ = R \cdot C

τ - Time Constant?R - Resistance?C - Capacitance?

Time Constant for RC Circuit Example

With values

With units

Only example

Here is how the Time Constant for RC Circuit equation looks like with Values.

Here is how the Time Constant for RC Circuit equation looks like with Units.

Here is how the Time Constant for RC Circuit equation looks like.

21 = 60 \cdot 350

21ms = 60Ω \cdot 350μF

21 = 60 \cdot 350

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Time Constant for RC Circuit Solution

Follow our step by step solution on how to calculate Time Constant for RC Circuit?

FIRST Step Consider the formula

τ = R \cdot C

Next Step Substitute values of Variables

∴

τ = 60Ω \cdot 350μF

Next Step Convert Units

∴

τ = 60Ω \cdot 0.0004F

Next Step Prepare to Evaluate

∴

τ = 60 \cdot 0.0004

Next Step Evaluate

∴

τ = 0.021s

LAST Step Convert to Output's Unit

∴

τ = 21ms

Time Constant for RC Circuit Formula Elements

Variables

Time Constant

Time constant is the response representing the elapsed time required for the system response to decay to zero if the system had continued to decay at the initial rate.

Symbol: τ

Measurement: TimeUnit: ms

Note: Value should be greater than 0.

Formulas to find Time Constant

Resistance

Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω).

Symbol: R

Measurement: Electric ResistanceUnit: Ω

Note: Value can be positive or negative.

Formulas to find Resistance

Capacitance

Capacitance is the capability of a material object or device to store electric charge. It is measured by the change in charge in response to a difference in electric potential.

Symbol: C

Measurement: CapacitanceUnit: μF

Note: Value can be positive or negative.

Formulas to find Capacitance

Other Formulas to find Time Constant

Go Time Constant for RL Circuit

τ = \frac{L}{R}

Other formulas in Time Constant category

Go Electrical Angle

θ e = (\frac{N p}{2}) \cdot θ m

How to Evaluate Time Constant for RC Circuit?

Time Constant for RC Circuit evaluator uses Time Constant = Resistance*Capacitance to evaluate the Time Constant, The Time Constant for RC Circuit is the time after which the voltage across a capacitor reaches its maximum value if the initial rate of rising voltage is maintained. Time Constant is denoted by τ symbol.

How to evaluate Time Constant for RC Circuit using this online evaluator? To use this online evaluator for Time Constant for RC Circuit, enter Resistance (R) & Capacitance (C) and hit the calculate button.

FAQs on Time Constant for RC Circuit

What is the formula to find Time Constant for RC Circuit?

The formula of Time Constant for RC Circuit is expressed as Time Constant = Resistance*Capacitance. Here is an example- 21000 = 60*0.00035.

How to calculate Time Constant for RC Circuit?

With Resistance (R) & Capacitance (C) we can find Time Constant for RC Circuit using the formula - Time Constant = Resistance*Capacitance.

What are the other ways to Calculate Time Constant?

Here are the different ways to Calculate Time Constant-

Time Constant=Inductance/Resistance

Can the Time Constant for RC Circuit be negative?

No, the Time Constant for RC Circuit, measured in Time cannot be negative.

Which unit is used to measure Time Constant for RC Circuit?

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

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