INTRODUCTION TO FIELDS

Question 1

How many types of fields are there? name them

Answer 1

There are 3 types of fields

+ magnetic fields
+ electric fields
+ gravitational fields

Question 2

state a property of every magnet

Answer 2

Every magnet has a magnetic field

Question 3

describe what happens to a magnetic material in a magnetic field

Answer 3

In a magnetic field any magnetic material will experience a force

Question 4

explain why wood won’t experience a force in a magnetic field

Answer 4

Wood is not a magnetic material therefore it won’t experience any force in a magnetic field

Question 5

what makes an electric field?

Answer 5

Any object with an electric charge has an electric field

Question 6

name at least 3 things that have an electric field

Answer 6

proton (+)
electron (-)
anti neutrino (-)

Question 7

if an object has a net positive or…

Answer 7

net negative charge then it has an electric field.

Question 8

what happens if an object has a net charge of 0?

Answer 8

The object won’t have an electric field as it has no charge, hence it won’t experience a force in an electric field

Question 9

what will experience a force in an electric field?

Answer 9

Any object with a charge will experience a force

Question 10

What makes a gravitational field?

Answer 10

Anything with mass has a gravitational field

Question 11

what will experience a force in a gravitational field?

Answer 11

Any object with mass will experience a force in a gravitational field

Question 12

What is a field?

Answer 12

A field is a region of space where an object experiences a non-contact force

Question 13

what is the range of gravitational and electric and magnetic fields?

Answer 13

The range of gravitational, electric and magnetic fields are all infinite

Question 14

name 2 things field line diagrams show

Answer 14

direction and magnitude

Question 15

gravitational field lines show…

Answer 15

the direction that any mass would experience a force

Question 16

magnetic field lines show…

Answer 16

The direction that the north pole would experience a force

Question 17

electric field lines show…

Answer 17

electric field lines show the direction that a positive charge would experience a force

Question 18

why do field lines never cross?

Answer 18

that means the object experiences a force in 2 directions at the same time

Question 19

what is field line density?

Answer 19

How closely packed the field lines are

Question 20

state the relationship between field line density and field strength

Answer 20

Field strength and field line density are directly proportional

Question 21

state the relationship between field line density and force

Answer 21

directly proportional.

The greater the field line density, the greater the force.

Question 21

in a uniform field the magnitude…

Answer 21

of the force on an object is constant throughout the field. We can say the field strength is uniform

Question 21

state the conditions for a uniform field

Answer 21

where field lines are straight, parallel, evenly spaced and all point in the same direction.

ONLY UNIFORM IF ALL 4 CONDITIONS ARE TRUE

Question 22

state a property of a uniform field

Answer 22

The direction of a force on an object is constant anywhere in the field

Question 23

in a uniform field the field line density

Answer 23

is constant throughout

Question 23

state the conditions for a radial field

Answer 23

field lines are straight, spread out equally and meet in the centre

Question 24

what happens to the field strength as we move further away from the object in a radial field

Answer 24

the field strength decreases because as we move further away from the object the field lines become less dense.

Question 25

in a radial field the direction of the force…

Answer 25

acts either towards or away from the centre