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