Physics radiation + magnets

Nuclear equations meaning

shows alpha or beta decay and the element formed after decay

Alpha radiation

helium nucleus

beta radiation

an electron

gamma radiation

photon, energy

direction of magnetic field

from north to south

magnetically hard

permanently magnetized, will not lose its magnetism

magnetically soft

temporarily magentized materials, can quickly lose magnetism

contamination

when a radioactive source has been in contact with something enough to make the other object radioactive by taking in the source, it is unintentional.

irradiation

when an object is exposed to a radioactive source, it is intentional

fission

a radioactive nucleus splits into 2 smaller more stable nuclei

critical mass

the minimum amount of mass needed to maintian a fission chain reaction

fusion

two smaller nuclei fuse to form one larger one.

solenoid coil directions pole meaning

Anti-clockwise turn is north, clockwise is south pole

transformer efficiency

V₁I₁ = V₂I₂