ch21 - uniform electric fields

Question 1

electric charge

Answer 1

property of an object that gives rise to a force on the body when the body is in an electric field

Question 2

object are usually

Answer 2

neutral

Question 3

neutral objects can become charged by

Answer 3

rubbing them against each other

Question 4

like charges

Answer 4

repel

Question 5

unlike charges

Answer 5

attract

Question 6

electrostatic induction

Answer 6

charged object can attract uncharged one

Question 7

three types of parricles matterv is made up from

Answer 7

. protons
. neutrons
. electrons

Question 8

charging uncharged objects by rubbing them

Answer 8

. when rubbing, friction is created between them
. delocalised electrons transfer from one material to another
. objects become charged

Question 9

electrostatic induction

Answer 9

. positive charged object brought next to uncharged
. electrons are attracted
. ATTRACTION

Question 10

how to guaranteet
that both objects are charged

Answer 10

repulsion

Question 11

electrostatics

Answer 11

. stationary electrons
. insulators

Question 12

electrodynamics

Answer 12

. moving electrons
. conductors

Question 13

electric field

Answer 13

a force field or region in which an electric charged particle or object experiences a force

Question 14

to produce electric field

Answer 14

unbalanced charges required

Question 15

why gold foil momentarily deflects in electric field?

Answer 15

. positive ions more to negative side faster (same direction as field)
. deflects to negative side

Question 16

field of force

Answer 16

. a refion of space where an object feels a force
. force may be gravitational, electric, magnetic, etc

Question 17

electric field is a

Answer 17

field of force

Question 18

electric fields

Answer 18

act on objects with electric charges

Question 19

magnetic fields

Answer 19

act on magnetic materials, magnets and moving charges

Question 20

gravtiational fields

Answer 20

act on objects with mass

Question 21

field lines

Answer 21

lines drawn to represent the strength and direction of a field of force

Question 22

arrows go from

Answer 22

positive to negative

Question 23

types of fields

Answer 23

. uniform field
. radial field

Question 24

uniform field

Answer 24

. same strength
. electric field between plates

Question 25

radial field

Answer 25

. spreads outwards in all direction . electric field around point charge

Question 26

earthing

Answer 26

electrons go to ground, 0V

Question 27

electric field strength

Answer 27

the force per unit charge exertwd on a stationary positive charge at that point

Question 28

E = F/Q

Answer 28

electric field strength, NC^-1

Question 29

E = <>V / <>d

Answer 29

strength of uniform field betweem two parallel metal plates

Question 30

E and V relation

Answer 30

proportional

Question 31

E and d relation

Answer 31

indirectly proportional

Question 32

F = eV/d

Question 33

electron moving through negative plate at top, positive plate at bottom

Answer 33

electron moves down in a parabola, accelerating downwards