Physics - P3
5.0 / 5 based on 1 rating
- Created by: jessicawilkinson2
- Created on: 29-05-18 12:16
when an object gains electrons, what is it's charge?
negative
1 of 28
when an object loses electrons, what is it's charge?
positive
2 of 28
how is static caused?
transfer of electrons
3 of 28
when will two objects attract?
when their charges are opposite
4 of 28
how can you test if an object is charged?
hold it near small pieces of paper. they will jump if the object is charged, as it induces a charge in the paper. you can also hold it near a stream of water - it will bend if a charge is present.
5 of 28
when will an object become neutrally charged?
when there is an equal amount of positive and negative charge in an object.
6 of 28
if the materials involved in an experiment are conductors, what will happen in terms of electrons?
electrons will flow back into or out of them, meaning they stay neutral.
7 of 28
if the materials involved in an experiment are insulators, what will happen in terms of electrons?
electrons cannot flow, so a positive static charge is left on the object that has lost electrons, and a negative charge on the object that has gained electrons
8 of 28
define potential difference.
driving force that pushes current around
9 of 28
define current
rate of flow of electric charge. current will only flow through a component if there is a pd, and the circuit is closed.
10 of 28
equation for charge
current x time
11 of 28
equation for energy transferred
charge x pd
12 of 28
what components does a standard test circuit have?
voltmeter, ammeter, cell, variable resistor, thermistor.
13 of 28
equation for potential difference
current x resistance
14 of 28
what is the structure for a series circuit?
all components are connected in a line, meaning removing one component will affect the circuit greatly.
15 of 28
what is the structure for a parallel circuit?
each component is seperately connected to terminals, meaning removing a component won't have much affect on the circuit.
16 of 28
what is the rule for pd in a series / parallel circuit?
series = shared across brances parallel = same across branches
17 of 28
what is the rule for current in a series / parallel circuit?
series = same across branches parallel = shared across branches
18 of 28
what is the rule for resistance in a series / parallel circuit?
series = total is sum of resistance across each branch parallel = always smaller than that of the branch with the smallest resistance
19 of 28
equation for power (1)
potential difference x current
20 of 28
equation for power (2)
current^2 x resistance
21 of 28
define magnetic flux density
strength of magnetic field
22 of 28
how can you see magnetic field patterns?
use iron filings on top of paper, or a compass to mark out direction.
23 of 28
the larger the electric current...
...the stronger the magnetic field
24 of 28
how can you increase current with a solenoid around an iron bar?
add more coils
25 of 28
equation for a force on a conductor carrying a current
magnetic flux density x current x length
26 of 28
what does each finger represent in Fleming's left hand rule?
thuMb = Motion, First Finger = Field, seCond finger = Current
27 of 28
how does a motor work?
a current carrying coil sits between two opposite poles of a magnet. since the current flows in different directions, each side experiences forces in the opposite direction.
28 of 28
Other cards in this set
Card 2
Front
when an object loses electrons, what is it's charge?
Back
positive
Card 3
Front
how is static caused?
Back
Card 4
Front
when will two objects attract?
Back
Card 5
Front
how can you test if an object is charged?
Back
Related discussions on The Student Room
- Messed up CIE Math P3 and Physics P4. »
- A level/revision help! »
- Physics practical »
- AQA A Level Psychology Essays »
- edexcel ial math a* requirements »
- How should I space my revision plan for my A-Levels? »
- Leaving A level mathematics a week before the exam. »
- Ocr a physics 2023 grade boundaries »
- Exam Dates A Levels 2024 »
- How to get a full UMS in Pure Maths 3? »
Similar Physics resources:
1.0 / 5 based on 2 ratings
1.0 / 5 based on 2 ratings
0.0 / 5
1.0 / 5 based on 2 ratings
1.0 / 5 based on 8 ratings
1.0 / 5 based on 1 rating
0.0 / 5
1.5 / 5 based on 8 ratings
1.0 / 5 based on 2 ratings
Comments
No comments have yet been made