Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

A Level Physics > Fields > Flashcards

Fields Flashcards

1
Q

What does gravity, magnetic fields or electric fields affect?

A

Gravity affects masses
Magnetic fields affect magnetic materials and currents in conductors
Electric fields affect charged particles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Draw a magnetic field on a magnet

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What does the density of field lines represent

A

Field strength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Draw electric fields

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Draw the gravity around the planet

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Strength of gravitational field on earth’s surface

A

9.81 N/kg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Field strength def

A

Newtons per thing affected

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Gravitational field strength (g) unit

A

N/kg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Electric field strength (E) unit

A

N/C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Magnetic field strength (B) unit

A

N/magneticness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Draw the gravitational fields between two masses

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Graph of gravity against radius

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What’s X?

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Gravitational Potential Energy def

A

The energy of an object due to its position in a gravitational field

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is gravitational potential

A

The work done per unit mass to move a small object from infinity (where GPE is zero) to that point.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are equipotentials

A
  • Surfaces of constant potential
  • this means that no work needs to be done to move along an equipotential surface
  • on a planet, the further away from the surface, the weaker the gravitational field. This means that, further away from the earth, the equipotentials for equal increases in potentials are spaced further apart.
17
Q

Draw the equipotentials around the earth

A
18
Q

What is a potential gradient at a point in a gravitational field

A

The change of potential per meter at that point

  • near the earths surface, the potential changes by 9.8J/kg for every meter of height gained. So the potential gradient near the surface of the earth is constant and equal to 9.8J/Kg / m
19
Q

What symbol is used to represent gravitational potential in equations

A

V

20
Q

Does it take energy to move between equipotentials?

A

Yes because moving between equipotentials means a change in energy, which means work must be done.

21
Q

Equation linking work done to move equipotentials, mass of object and change in potential

A
22
Q

What is escape velocity

A

How fast you need to be travelling to escape a planets gravity

23
Q

What does escape velocity depend on?

A

Gravitational potential at the point in the field the object is at (normally at the surface)

24
Q

Equation for escape velocity

A
25
Q

How do we get an object into orbit?

A
26
Q

Equation for a planets time period (M= mass of sun)

A
27
Q

Equation for the velocity of a satellite in orbit due to the force of gravity

A
28
Q

Equation for the kinetic energy of a satellite in orbit due to the force of gravity

A
29
Q

Show how a satellites kinetic energy is half the magnitude of its potential energy

A
30
Q

Equation for the total energy of a satellite in orbit due to the force of gravity

A
31
Q

Gravitational potential energy equation

A

A Level Physics (33 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions