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Particle Acceleration in Electric Field Calculator

Calculate acceleration of a charged particle in an electric field using a = qE/m with charge, mass, and field strength.

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Acceleration of a Charged Particle

A charged particle in a uniform electric field experiences an electric force \(F = qE\). By Newton's second law, its acceleration is determined by charge, field strength, and mass.

Formula

$$a = \frac{qE}{m}$$

where \(q\) is charge in coulombs (C), \(E\) is electric field in newtons per coulomb (N/C), and \(m\) is mass in kilograms (kg). An electron (\(q = 1.602 \times 10^{-19}\) C, \(m = 9.109 \times 10^{-31}\) kg) in a 1000 N/C field accelerates at about \(1.76 \times 10^{14}\) m/s².

Direction and Sign

Positive charges accelerate in the direction of the electric field; negative charges accelerate opposite to the field. The magnitude depends only on \(|q|\), \(E\), and \(m\) when solving for acceleration magnitude.

Frequently Asked Questions

What is an electric field?

An electric field describes the force per unit charge at a point in space. Its SI unit N/C is equivalent to volts per meter (V/m).

Why is electron acceleration so large?

Electrons have very small mass, so the same force produces enormous acceleration compared to heavier particles like protons.

Does this include magnetic fields?

No. This calculator covers uniform electric fields only. Magnetic forces require the Lorentz force \(F = q(E + v \times B)\).

Can I use elementary charge units?

Yes. One elementary charge \(e = 1.602 \times 10^{-19}\) C. Multiply by the number of charges for ionized particles.

Where is this used?

Particle accelerators, cathode ray tubes, mass spectrometers, and plasma physics all rely on electric-field acceleration of charged particles.