Drift Speed Calculator

✖Electric Field is the force per unit charge at a given point in space, created by the presence of electric charges or changing magnetic fields.ⓘ Electric Field [E]			+10% -10%
✖Relaxation time is the time taken by the current in a circuit to decay to a certain fraction of its initial value.ⓘ Relaxation Time [𝛕]			+10% -10%

✖Drift Speed is the average velocity of electrons in a conductor, which is responsible for the flow of electric current.ⓘ Drift Speed [V_d]

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Formula

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Drift Speed

Formula

V d = \frac{E \cdot 𝛕 \cdot [Charge-e]}{2 \cdot [Mass-e]}

Example

2.6E+17 mm/s = \frac{60 V/mm \cdot 0.05 s \cdot [Charge-e]}{2 \cdot [Mass-e]}

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Drift Speed Solution

STEP 0: Pre-Calculation Summary

Formula Used

Drift Speed = (Electric Field*Relaxation Time*[Charge-e])/(2*[Mass-e])
V_d = (E*𝛕*[Charge-e])/(2*[Mass-e])
This formula uses 2 Constants, 3 Variables

Constants Used

[Charge-e] - Charge of electron Value Taken As 1.60217662E-19
[Mass-e] - Mass of electron Value Taken As 9.10938356E-31

Variables Used

Drift Speed - (Measured in Meter per Second) - Drift Speed is the average velocity of electrons in a conductor, which is responsible for the flow of electric current.
Electric Field - (Measured in Volt per Meter) - Electric Field is the force per unit charge at a given point in space, created by the presence of electric charges or changing magnetic fields.
Relaxation Time - (Measured in Second) - Relaxation time is the time taken by the current in a circuit to decay to a certain fraction of its initial value.

STEP 1: Convert Input(s) to Base Unit

Electric Field: 60 Volt per Millimeter --> 60000 Volt per Meter (Check conversion here)
Relaxation Time: 0.05 Second --> 0.05 Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

V_d = (E*𝛕*[Charge-e])/(2*[Mass-e]) --> (60000*0.05*[Charge-e])/(2*[Mass-e])

Evaluating ... ...

V_d = 263823003408586

STEP 3: Convert Result to Output's Unit

263823003408586 Meter per Second -->2.63823003408586E+17 Millimeter per Second (Check conversion here)

FINAL ANSWER

2.63823003408586E+17 ≈ 2.6E+17 Millimeter per Second <-- Drift Speed

(Calculation completed in 00.004 seconds)

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Birsa Institute of Technology (BIT), Sindri

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< Basics of Current Electricity Calculators

Drift Speed given Cross-Sectional Area

Go Drift Speed = Electric Current/(Number of Electrons*[Charge-e]*Cross-Sectional Area)

Drift Speed

Go Drift Speed = (Electric Field*Relaxation Time*[Charge-e])/(2*[Mass-e])

Electromotive Force when Battery is Charging

Go Electromotive Voltage while Charging = Electromotive Force+Electric Current*Electric Resistance

Electric Current given Charge and Time

Go Electric Current = Charge/Total Time Taken

Drift Speed Formula

Drift Speed = (Electric Field*Relaxation Time*[Charge-e])/(2*[Mass-e])
V_d = (E*𝛕*[Charge-e])/(2*[Mass-e])

What is drift speed of an electron?

Drift speed is the average velocity that an electron acquires due to an electric field in a conductor. It is much slower compared to the random motion of electrons but is crucial for understanding the flow of electric current.

How to Calculate Drift Speed?

Drift Speed calculator uses Drift Speed = (Electric Field*Relaxation Time*[Charge-e])/(2*[Mass-e]) to calculate the Drift Speed, Drift Speed formula is defined as a measure of the average velocity of electrons in a conductor, which is influenced by the electric field and the properties of the conductor, providing insight into the behavior of electrons in electrical circuits. Drift Speed is denoted by V_d symbol.

How to calculate Drift Speed using this online calculator? To use this online calculator for Drift Speed, enter Electric Field (E) & Relaxation Time (𝛕) and hit the calculate button. Here is how the Drift Speed calculation can be explained with given input values -> 2.6E+20 = (60000*0.05*[Charge-e])/(2*[Mass-e]).

FAQ

What is Drift Speed?

Drift Speed formula is defined as a measure of the average velocity of electrons in a conductor, which is influenced by the electric field and the properties of the conductor, providing insight into the behavior of electrons in electrical circuits and is represented as V_d = (E*𝛕*[Charge-e])/(2*[Mass-e]) or Drift Speed = (Electric Field*Relaxation Time*[Charge-e])/(2*[Mass-e]). Electric Field is the force per unit charge at a given point in space, created by the presence of electric charges or changing magnetic fields & Relaxation time is the time taken by the current in a circuit to decay to a certain fraction of its initial value.

How to calculate Drift Speed?

Drift Speed formula is defined as a measure of the average velocity of electrons in a conductor, which is influenced by the electric field and the properties of the conductor, providing insight into the behavior of electrons in electrical circuits is calculated using Drift Speed = (Electric Field*Relaxation Time*[Charge-e])/(2*[Mass-e]). To calculate Drift Speed, you need Electric Field (E) & Relaxation Time (𝛕). With our tool, you need to enter the respective value for Electric Field & Relaxation Time and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Drift Speed?

In this formula, Drift Speed uses Electric Field & Relaxation Time. We can use 1 other way(s) to calculate the same, which is/are as follows -

Drift Speed = Electric Current/(Number of Electrons*[Charge-e]*Cross-Sectional Area)

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