Chapter 21 Flashcards
The end of a magnet that points _____ is the south-seeking pole of that magnet
north
when a magnetic substance is close to or touches a magnet, it becomes magnetized by ______
magnetic induction
the N-pole of a compass points toward the ____ pole of the earth
south
the _____ density is the number of magnetic field lines per unit area
magnetic flux
_____ discovered that when a current-bearing wire is held near a compass, the needle is deflected
Oersted
the magnetic field around a wire is ____ in shape
circular
by placing an iron core inside the coil of wire, the strength of an electromagnet can be ____
increased
_____ reasoned that the magnetic effects of a bar magnet must be the result of tiny loops of current within the bar
Ampere
_____ are small groups of atoms which act together in a magnetic material
domains
the strength of a magnetic field is called magnetic_______
induction
_______ discovered that when a current-carrying wire and a magnetic field are perpendicular to one another, a force acts on the wire due to interaction of the fields
Faraday
the unit of magnetic induction is the ____
Tesla
the path of a charged particle in a magnetic field is ____ because the force is always perpendicular to its velocity
circular
right hand rule for magnetism
fingers = B
thumb = V
out of palm = FB
Earth’s north pole is really a magnetic ______ pole
southern
