Unit 12 equations

Question 1

Fm= I x L x B x Sin (0)

Answer 1

Magnetic force of a charge carrying wire WITHIN a magnetic field

Question 2

B= mI/2πr

Answer 2

Field strength around a wire

Question 3

finding current excerpted on another wire

Answer 3

B1=µI1/2πr

Force of 2/ L = I (current) of 2 x B (field) of 1

multiply them together

Question 4

paramagnetic

Answer 4

exhibits properties of magnetism, but isn’t permanently magnetized, when near a magnet will magnetize but when pulled away will go back to being unmagnetized

Question 5

ferromagnetic

Answer 5

a property of certain materials that results in a significant, observable magnetic permeability,

Question 6

force of wire from 2 wires

Answer 6

find direction, same current direction = add

F/L = I x B
B =µ x I /2πr

plug B into equation: I x µ x I /2πr
add/subtract each wire to each other to get final force

Question 7

RHR

Answer 7

thumb –> direction/motion
Pointer –> field
Rest –> current

Question 8

e = πr^2(change in B/ change in t)

Answer 8

Induced emf formula

Question 9

E=B x L x V

Answer 9

voltage (emf) in wire based on velocity

Question 10

ΦB = B x A x Cosθ

Answer 10

magnetic flux