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Flashcards in fields and forces Deck (23):
1

field

region where a force is experienced by a particle possessing the relevant property

2

field strength

the force acting per unit charge/mass, it is a vector

3

field/flux lines

direction can be shown along with magnitude shown by the width of the lines

4

Newton's universal law of gravitation

every particle in the universe exerts an attractive force on every other particle. The magnitude of the force can be seen through F=G(m1m2/r^2)
G is the universal gravitational constant that is the same anywhere in the universe
particles that are separated by more than their radii can be treated as point masses (middle of the mass)

5

gravitational field strength

the gravitational force per unit mass or the gravitational flux per unit area. the direction= the direction a unit point mass would move
SI=Nkg^-1or Nms^-1

6

gravitational field strength at the surface of the planet

F=G(M/r^2) where M is the mass of the planet.
the field are radial pointing towards the planet

7

law of conservation of electric charge

the net charge of an isolated system remains constant

8

Coulomb's law

two charges at a distance r exerts a force on each other in line between them with a magnitude of F=k(q1q2/r^2) or F=q1q2/4πε0r^2

9

electric field strength

the electric force per unit charge or the electric flux per unit area. direction= direction a unit positive charge would move
SI=N per Coulomb

10

magnetic north/ south

direction of the current points north

11

magnetic field magnitude (strength

the magnitude flux per unit area
SI=Nm^-1A^-1=tesla
direction= direction a North pole would move (right hand grip rule)

12

magnitude of the force on a charge moving in a magnetic field

F=qvBsinΘ
B magnitude of magnetic field
v velocity of charge

13

Magnitude of force on a current-carrying conductor in a magnetic field

F=BILsinΘ
B magnitude of current

14

Flemming's left hand rule

for direction of the force on a charge/current in a magnetic field
THumb direction of force/THurst
SeCond finger is Current
First finger is direction of magnetic field

15

Uniform field

Constant strength; field lines parallel and equidistant for each other.

16

Radial field

Non-uniform field around pint charge or mass

17

Electron direction and magnetic field (charges and poles)

N to S (force out or in)

18

Uniform field

Constant strength; field lines parallel and equidistant for each other.

19

Radial field

Non-uniform field around pint charge or mass

20

Electron direction and magnetic field (charges and poles)

N to S (force out or in)

21

Uniform field

Constant strength; field lines parallel and equidistant for each other.

22

Radial field

Non-uniform field around pint charge or mass

23

Electron direction and magnetic field (charges and poles)

N to S (force out or in)