Torque on a current-carring loop


When current is passed through the loops, the magnetic field exerts torque on the loops, which rotates a shaft. Electrical energy is converted to mechanical work in the process. Motors are the most common application of magnetic force on current-carrying wires. Motors have loops of wire in a magnetic field.

Related formulas


τTorque (N*m)
NTurns of the loop (dimensionless)
ICurrent (A)
AArea of each turn (m2)
BMagnetic field (T)
θAngle between th perpendicular to the loop and the field (degrees)