Magnetsim And Electromagnetism- The Motor Effect Flashcards
What is produced when current flows through a conducting wire?
A magnetic field is produced around the wire
What determines the strength of the magnetic field around a current-carrying wire?
The magnitude of the current flowing through the wire
The distance from the wire
What is a solenoid?
A coil of wire which when current passes through creates a strong magnetic field
describe the magnetic field found inside a solenoid?
Strong and uniform
What is an electromagnet?
A solenoid with an added iron core
Adding the iron core increases the strength of the magnetic field
What is the motor effect?
When a force is exerted between a magnetic field and a current-carrying conductor placed in that field
What rule is used to determine the force experienced due to the motor effect?
Flemings left-hand rule
When using Flemings left hand rule what does the forefinger represent
The forefinger points in the direction of the magnetic field
When using Flemings left hand rule what does the second finger represent?
The second finger points in the direction of current flow in the conductor
What factors affect the size of the force on a current carrying wire in a magnetic field?
The magnitude of the current flowing through the conductor
The strength of the magnetic field that the conductor is placed in
If the direction of current in a current carrying wire placed in a uniform magnetic field is reversed what happens to the force?
The direction of the force is reversed
If the strength of the current in a current carrying wire place in a uniform magnetic field is increased what happens to the force?
The strength of the force is increased
What criteria must be met for the equation linking force, magnetic flux density, current and length to hold?
The conductor must be at right angles to the magnetic field it is placed in
What is the unit used for magnetic flux density?
Tesla(t)
