Field Basics Flashcards
Define a magnetic field
A region of space in which a magnetic object experiences a force
What are the three magnetic materials?
Iron (therefore steel)
Nickel
Cobalt
What does the proximity of field lines to each other signify?
Field Strength (closer lines means a stronger field)
What must you remember about the Earth’s magnetic poles? Why is this?
The magnetic North is the geographical South, as the polarity of the Earth periodically flips
What surrounds a current carrying wire?
A magnetic field, taking the form of concentric circles
What is the use of the right hand grip rule?
Aligning your thumb with CONVENTIONAL current flow, you can use your fingers to see which way the field lines rotate around the wire
What happens when you change the shape of a current carrying wire?
The B field change shape
What is the field around a solenoid similar to?
The field around a bar magnet
What can you say about the field lines within a solenoid wire?
They are equidistant, meaning the field is of uniform strength
When a current carrying wire is placed perpendicular to a magnetic field, what is the rule?
Force on the wire is directly proportional to the current through the wire
Practical: Investigating force on a current carrying conductor in a magnetic field. State the variables
Independent: Current
Dependant: Force
Control: Length of wire, Strength of magnetic field
What is the equation for force on a current carrying conductor in a B field?
Force = Magnetic flux densityCurrentLength* sin of angle to magnetic field
What is the equation for force on a charged particle in a B field?
Force = Magnetic flux densitychargevelocity* sin of angle of particle path to magnetic field
