Electricity Revision by Ruben Calverd https://padlet.com/rubencalverd/zivlxycpzd3j Specification points en-us 2017-11-13 07:13:25 UTC 2023-10-15 20:19:45 UTC hello@padlet.com Jude Keeling : https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111369 2.14 know that current is the the rate flow of charge
current is the flow of charge round a circuit. current will only flow through a component if there is a voltage across a component
]]> 2017-11-13 07:18:58 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111369 (il.put) 2.11 https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111385 describe the qualitative variation of resistance of light-dependet resistors with illumination and thermistors with temperature. 
 LDR is a light dependent resistor. Its resistance changes with the intensity of light: the brighter it is the less resistance; the less light the more resistance. Thermistors are temperature dependent resistors.
2.9
describe how current varies with voltage in wires, resistors, metal filament lamps and diodes, and how to investigate this experimentally.
If you increase the resistance the current will decrease. Resistors, metal filament lamps and diodes all create resistance in a circuit and so will decrease the current.
]]> 2017-11-13 07:19:03 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111385 (Anna) 2.5 Energy Transferred https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111397 energy transferred = current x voltage x time]]> 2017-11-13 07:19:06 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111397 🐙 https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111443 2.17 - Understand why current is conserved at a junction in a circuit.

The total amount of current flowing into the junction, or split, is equal to the total current flowing out.

http://www.bbc.co.uk/schools/gcsebitesize/science/add_edexcel/controlling_current/circuitsrev1.shtml]]> 2017-11-13 07:19:21 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111443 Emilie https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111505 2.21 Know and use the relationship between energy transferred, charge and voltage:
energy transferred = charge x voltage 
E = Q x V 

E = 4.3 x 5 
E = 21.5 ]]> 2017-11-13 07:19:36 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111505 Leonardo https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111599 2.7 Explain why a series or parallel circuit is more appropriate for particular applications, including domestic lighting.
parallel circuits are more appropriate for domestic purposes than series circuits because in a parallel circuit components can be disconnected without others being majorly affected, whilst in a series circuit if one component is disconnected all components disconnect.

]]> 2017-11-13 07:19:58 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111599 Mr. Raccooon 2.2 Super_Grumpy https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111601 Understand how the use of insulation, double insulation, earthing, fuse and circuit breakers protects the device or user in a range of domestic appliances.


Insulation is covering a live wire with a material that won't conduct the electricity.

Double insulation is a precaution that makes sure the live wire cannot touch the casing (so no shock can be conducted) usually by putting extra insulation round that wire.
 Double insulation can also mean that the casing of an object is plastic so even if the wire touches it, it wont conduct.

An earth wire is touching the case so that if a current is in the case, it will be directed through the earth wire, this will then take the current to the earth. 
Additionally the surge of electricity in the wire may break the fuse.

Fuses are sections of wire in the circuit that melt if too high a current goes through them. They come with different maximum currents.

Circuit breakers have an electromagnet that is activated if the current goes above a certain limit. 
The electromagnet pulls an iron switch towards it, this opens the switch and breaks the circuit.]]> 2017-11-13 07:19:58 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111601 DONG https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111657 2.22P identify common materials which are electrical conductors or insulators,including metals and plastics .                                                        

]]> 2017-11-13 07:20:19 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111657 Jude Keeling 2 https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111812 2.15 know and use the relation ship between charge, current and time:
charge = current x time
Q= I x t

if your phone uses 10amp for 10 seconds how much charge will my phone have?

]]> 2017-11-13 07:21:15 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111812 2.19 Find the Voltage and the current then, Power= Voltage x Current spencer_duchemin https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111821

]]> 2017-11-13 07:21:18 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111821 🐙 II https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111845 2.1 - Use the following units: Ampere (A), coulomb (C), joule (J), ohm (Ω), second (s), volt (V) and watt (W)


]]> 2017-11-13 07:21:25 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111845 satoshi Yamada: 2.13 - know that electric current in solid metallic conductors is a flow of negatively charged electrons https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111880 Current flows from positive (+) to negative (-)
Electrons flow from negative (-) to positive (+)

]]> 2017-11-13 07:21:43 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111880 (Anna) 2.6 Know the difference between mains electricity being alternating current (a.c) and direct current (a.c) being supplied by a cell or battery https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111921 Alternating current is an electric current that reverses its direction; a direct current is doesn't change its direction 

]]> 2017-11-13 07:22:00 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206111921 (Molly) - 2.20 Know that mollyannbryan https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112020
  • Voltage is the energy transferred per unit charge passed.
  • The volt is a joule per coulomb.

    • https://www.bbc.co.uk/education/guides/z88hvcw/revision/5
    ]]>     2017-11-13 07:22:38 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112020     (Mr Calverd) - 2.25 Know that there are forces of attraction between unlike charges and forces of repulsion between like particles rubencalverd https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112070
    Objects can become either positively or negatively charged. If two objects have the same charge then they will be attracted to each other, but if their charges are different, then they will repel one another.]]>     2017-11-13 07:22:58 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112070     (Molly) - 2.3 Understand why a current in a resistor results in the electrical transfer of energy and increase in temperature and how this can be used in a variety of domestic contexts. mollyannbryan https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112293 A current in a resistor transfers to heat energy. The heat will make the fuse melt causing the circuit to stop. 
    e.g. If a kettle breaks and the heating thing is touching the metal. Instead of receiving an electric shock the fuse will break the circuit.]]>     2017-11-13 07:24:13 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112293     lea 1 lea_levy https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112429 2.12 know that lamps and LEDs can be used to indicate the presence of a current in a circuit

    for example we can see on a kettle a little light red LED turn on ]]>     2017-11-13 07:24:55 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112429     2.10We can regulate the electricity depending of which object we want to connect. spencer_duchemin https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112561 2017-11-13 07:25:47 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112561 Emilie https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112587 2.24 Explain how positive and negative electrostatic charges are produced on materials by the loss and gain of electrons
    Example for a car:
    The electrons flow down the strap to the ground if the charge is negative and flow up the strap from the ground if the charge is positive.]]>     2017-11-13 07:26:00 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112587     lea 2 lea_levy https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112589 2.18 know that the voltage across two components connected in parallel is the same

    if you remove or disconnect one of them, it will hardly affect the others. ]]>     2017-11-13 07:26:01 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112589     Satoshi Yamada: https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112831 2.13 - Know and use the relationship between voltage, current and resistance:
    voltage = current x resistance 
    V = I x R
    tells us that the current, i, flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, r. ]]>     2017-11-13 07:27:20 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206112831     DONG https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206113600 2.23p practical:investigate how insulating materials can be charged by friction.]]> 2017-11-13 07:31:30 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206113600 Mr. Raccoon 2.4 Super_Grumpy https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206114205 Know and use the relationship between power, current and voltage :

    power = current X voltage

    P = I X V

    and apply the relationship to the selection of appropriate fuses.

    ]]>     2017-11-13 07:34:34 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206114205     (Anna) Equations that you need to know https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206114465 P=IV   (power(watts)= current(amps) x voltage(volts))
    Q=IT   (charge = current(amps) x time(secs))
    V=IR   (voltage(volts) = current(amps) x resistance(ohms)) ]]>     2017-11-13 07:35:59 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206114465     Jude Keeling 3 https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206114731 2.27 explain there potential dangers of electrostatic charges, e.g. when fuelling air crafts and tankers.

    a lot of static electricity will build up and can give a large electric shock.]]>     2017-11-13 07:37:26 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206114731     Leonardo https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206114790 2.8 Understand how the current in a series circuit depends on the applied voltage and the number and nature of other components.
    If more voltage is applied more current is flowing through the circuit. ]]>     2017-11-13 07:37:44 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206114790     (Mr Calverd) 2.26P - Explain electrostatic phenomena by talking about transfer of electrons. rubencalverd https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206114822 An object can become charged if it loses or gains electrons. If electrons move away from the object then it will have an overall positive charge.

    ]]>     2017-11-13 07:37:53 UTC https://padlet.com/rubencalverd/zivlxycpzd3j/wish/206114822