physics-motor effect

what is a conducting wire

any wire that has current flowing throughout

what would reversing the direction of current flow do?

reverse the direction of the magnetic field

what to do to increase the strength of the magnetic field?

coil the wire to form a solenoid

what to do to increase the strength around a solenoid?

increase the size of current, increase the number of turns, add an iron core

what is an electromagnet?

a solenoid with an iron core and a magnetic field that can be switched on and off

how to change the strength of the electromagnet?

increasing the current to increase the magnetic field or the opposite

what is the motor effect?

occurs when a wire with current flowing through it is placed in a magnetic field and experiences a force.

how to increase the size of the force?

increasing amount of current, stronger magnets, placing the wire 90* to the direction of the magnetic field lines

equation for the size of the force acting on a current-carrying wire in a magnetic field when perpendicular

force=magnetic flux density x current x length of conductor

size of the force acting on a current-carrying wire in a magnetic field when parallel

0

factors affecting the D.C motor

speed, direction of rotation, force

how to increase speed

increased by increasing the current and using a stronger magnet

what changes the direction of rotation?

changing the direction of current supply and reverse the poles

how to change force?

increase the current, strength of magnetic field and adding more turns.