Magnet and Solar system Flashcards
What is geocentric
Earth at centre of universe (incorrect)
What is Heliocentric
Sun at centre, Coper Nicus
What is a satellite
A body that orbits the earth or other cosmic bodies
Which ways do field lines move
Out of north, into south
Examples of permanent magnetic things
Iron, Nickel, Cobalt
Examples of temporary magnetic things
paperclips (induced)
Uniform field lines travel how?
In a straight line from N to S
What does current into look like
X in O (Back of arrow)
What does current out look like
. in O (Arrow head)
How to calc force on conductor
Mag field strength x current x length
What is a split-ring commutator
swaps the positive and negative connection every half turn which makes sure the coil always turns in the same direction
Describe how light from distant galaxies shows that the Universe is still expanding.
Wavelength of light appears to increase
Give one similarity and one difference when comparing the Big Bang theory with
the Steady State theory
Sim: Both have expanding universes
Dif: Steady State, Universe has
no beginning
