Magnetic Force on a Moving Charge Calculator
⚡ Electricity & magnetism. Use the Magnetic force on a moving charge formula to find force, magnetic field, charge, speed: pick the value you want, type the others, and the answer updates as you go.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Force | N |
| Magnetic field | T |
| Charge | C |
| Speed | m/s |
Worked example
Find the force when Magnetic field = 0.1 T, Charge = 1.6 × 10⁻¹⁹ C, Speed = 1 × 10⁶ m/s.
Using F = BQv: Force = 1.6 × 10⁻¹⁴ N.
Frequently asked questions
What is the formula for Magnetic force on a moving charge?
F = BQv.
What do the letters stand for, and what units are used?
Force in N, Magnetic field in T, Charge in C, Speed in m/s.
How do you calculate force?
Put the values into F = BQv. For example, with Magnetic field = 0.1 T, Charge = 1.6 × 10⁻¹⁹ C, Speed = 1 × 10⁶ m/s, force = 1.6 × 10⁻¹⁴ N.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (force, magnetic field, charge, speed) and fill in the others: it rearranges the formula for you.
