The Motor Effect Flashcards
What happens when a Current flows through a wire?
A magnetic field will be produced around the wire
What is the strength of the magnetic field generated by a wire dependant on?
The size of the current
The distance from the wire
What is the right hand grip rule?
When your thumb is pointing along the direction of conventional current, the other four fingers show the direction of magnetic field
How can the direction of the magnetic field of a solenoid determined by?
The right-hand grip rule (for straight wires or for solenoids)
How can you use the right hand rule for solenoids?
Grip the solenoid so that the curling fingers, curl in the direction of the current, the thumb will show the direction if the magnetic field
How can the strength of a magnetic field produced around a solenoid be increased?
Increasing the current
Using more turns of wire
Moving the turns closer together
Putting a soft iron core into the middle of the solenoid
What happens when a Current flows through a solenoid?
It becomes an electromagnet
When a conductor carrying a Current is placed into a magnetic field, what happens?
The conductor and the magnets producing the field will exert a force on one another
How can you determine the direction of the force exerted on a conductor when placed in a magnetic field?
Fleming’s left hand rule
What does each finger direct in Fleming’s left hand rule?
Thumb=force
Index=magnetic field
Middle=conventional current
What is the name of the quantity used when talking about the strength of a magnetic field?
Flux density
What are magnetic field lines called in magnetic flux density?
Lines of magnetic flux
What does it mean if lines of magnetic flux density are more closely packed?
Higher magnetic flux density
What is the unit for magnetic flux density
Tesla (T)
What us the symbol and unit of B, I And l?
B=magnetic flux density, T
I=current, Amps
l=length of conduct, m
