The Motor Effect Flashcards
explain what happens when a current flows through a conducting wire
a magnetic field is produced around the wire
the strength of the magnetic field depends on the current through the wire and the distance from the wire
describe what happens when you shape a wire to become a solenoid
has a similar shape to that of a bar magnet
adding an iron core increases the strength of the magnetic field of a solenoid
describe an electromagnet
a solenoid with an iron core
describe how the magnetic field of a current can be demonstrated
increasing the current through the wire increases the strength of the magnet
increasing the distance decreases the strength of the magnet
explain how a solenoid arrangement can increase the magnetic field of that current
you can increase the strength of a solenoids magnetic field by:
- adding an iron core to the solenoid
- increasing the current
- increasing the number of turns of wire on the solenoid
describe what is meant by the motor effect
when a conductor carrying a current is placed in a magnetic field, the magnet producing the field and the conductor exert a force on each other
state the factors that affect the size of the force on the conductor
- strength of magnetic field
- current flowing through the wire
- length of the wire
state the basis of an electric motor
a coil of wire carrying a current in a magnetic field tends to rotate
explain how the force on a conductor in a magnetic field causes the rotation of a coil in an electric motor
as the coil of wire carrying a current is in a magnetic field, the coil will experience a force
the coil of wire will experience an upwards force on the left hand side of the coil and a downwards force on the right hand side of the coil
as the coil will be fixed to an axle, the coil of wire will rotate in a clockwise direction
