Changes

** Magnets, either permanent magnets or electromagnets, which provide the magnetic field (commonly called the stator field) which interacts with the induced field of the current, causing it to turn

** Magnets, either permanent magnets or electromagnets, which provide the magnetic field (commonly called the stator field) which interacts with the induced field of the current, causing it to turn

The force on either side of the coil is given by ''F = nBIlsinX'' where n = number of coils, B = magnetic field density (tesla), I = current (amps), l = length of the wire (meters) and X is the angle of rotation of the coil (0^O when the coil is parallel to the stator field, 90^O when it is perpendicular to the field. This may seem contradictory, as in the motor effect a charged particle travelling parallel to a field will experience no force. However, the force on the coil is along the sides which are always perpendicular to the stator field, and hence will always experience a force, the reason the coil doesn't turn any further when it is at 90<sup>O</sup is because it has been deflected as far as it can go, and needs to have the current in the coil reversed to keep turning.

The force on either side of the coil is given by ''F = nBIlsinX'' where n = number of coils, B = magnetic field density (tesla), I = current (amps), l = length of the wire (meters) and X is the angle of rotation of the coil (0^O when the coil is parallel to the stator field, 90^O when it is perpendicular to the field. This may seem contradictory, as in the motor effect a charged particle travelling parallel to a field will experience no force. However, the force on the coil is along the sides which are always perpendicular to the stator field, and hence will always experience a force, the reason the coil doesn't turn any further when it is at 90^O is because it has been deflected as far as it can go, and needs to have the current in the coil reversed to keep turning.

Torque is defined as the turning effect of the force, in this scenario it is the ability of the motor to do work (eg turn another object). ''Torque = Fs'' where s is the distance of the application of the force to the turning point (in this case the side of the coil to the axle). However, as there are two sides to consider the value of s is the length of the coil not affected by the field, hence allowing the derrivation of ''Torque = BIAcosX'' where A is the area of the coil. A motor with high torque will be able to exert a larger force on another object, in contrast a motor with low torque may not be able to carry much of a load. Torque is not related to speed, a motor can have a high turning speed and low torque, and vice versa.

Torque is defined as the turning effect of the force, in this scenario it is the ability of the motor to do work (eg turn another object). ''Torque = Fs'' where s is the distance of the application of the force to the turning point (in this case the side of the coil to the axle). However, as there are two sides to consider the value of s is the length of the coil not affected by the field, hence allowing the derrivation of ''Torque = BIAcosX'' where A is the area of the coil. A motor with high torque will be able to exert a larger force on another object, in contrast a motor with low torque may not be able to carry much of a load. Torque is not related to speed, a motor can have a high turning speed and low torque, and vice versa.