Chapter 19 Flashcards
(9 cards)
What is magnetism?
What is the source of any magnetic field?
Close with electricity
Affects moving charges which produce magnetic fields (only moving charges produce magnetic fields)
Changing magnetic fields create electric fields
Source of any magnetic field is electric current
How do poles work (north and south)?
North Pole of a magnet or compass needle is the end that points towards north Like poles (N-N) repel and unlike poles (N-S) attract
How does the magnetic field work around north and south poles?
Slide 26-29 Nov 30
How does the geographic pole of earth correspond to the magnetic pole of earth?
Is the magnetic axis aligned with earth’s axis of rotation?
Geographic North Pole of Earth corresponds to the South Magnetic Pole
No it’s not
Slide 31 nov 30
What are the 2 circumstances where a charge experiences a force due to a magnetic field?
- The charge is moving
- The velocity of the charge has a component that is perpendicular to the magnetic field
Magnitude of magnetic force is maximum when charge is moving perpendicular to magnetic field
Charge moving parallel to magnetic field does not experience force by it
What is the direction of the magnetic force on a moving point charge?
It is perpendicular to the direction of both the velocity and the magnetic field
Slide 15-18 Dec 3
How do we show vectors into the page and vectors out of the page?
Into the page is a circle with an x
Out of page is a circle with a dot
Slide 19 Dec 3
How do you find the radius of a particle moving perpendicularly to a uniform magnetic field (in a circle)
r=mv/qB
Derivation on slide 25-26 Dec 3
What happens to a current carrying wire in a magnetic field?
Electric current is a movement of charge
Current carrying wire experiences a force
The force is due to the sum of the individual forces on the moving charged particles that comprise the current
Slide 25-28 Dec 5
