ELECTRICITY by https://padlet.com/nath113151/l6fkrkmprdfc summary en-us 2016-08-12 05:23:38 UTC 2026-03-16 20:05:27 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Dootheets.png CURRENT nath113151 https://padlet.com/nath113151/l6fkrkmprdfc/wish/118086287 - Electric current is a flow of electric charge from one point to another
- SI Unit is : Ampere (A)

- CONVENTIONAL CURRENT flows from positive to negative.
- ELECTRONS flow from negative to positive.

To measure a current, you use an AMMETER which is connected to the circuit in series.]]> 2016-08-12 05:33:39 UTC https://padlet.com/nath113151/l6fkrkmprdfc/wish/118086287 nath113151 https://padlet.com/nath113151/l6fkrkmprdfc/wish/119048144 e = electromotive force in volts, V
E = energy in joules, J
Q = charge in coulombs, C]]> 2016-08-21 15:00:34 UTC https://padlet.com/nath113151/l6fkrkmprdfc/wish/119048144 Electromotive Force (EMF) nath113151 https://padlet.com/nath113151/l6fkrkmprdfc/wish/119048553 - EMF is the energy provided by a cell or battery per coulomb of charge passing through it.
- SI Unit is : Volts (V)

]]> 2016-08-21 15:16:45 UTC https://padlet.com/nath113151/l6fkrkmprdfc/wish/119048553 Potential Difference nath113151 https://padlet.com/nath113151/l6fkrkmprdfc/wish/119048585 - Potential difference across an electrical component is needed to make a current flow through it.
- SI Unit is : Volts (V)

To measure a current, you use a VOLTMETER which is connected to the circuit in parallel.]]> 2016-08-21 15:18:03 UTC https://padlet.com/nath113151/l6fkrkmprdfc/wish/119048585 nath113151 https://padlet.com/nath113151/l6fkrkmprdfc/wish/119048807 V = Potential difference
W = Work done
q = Charge
△E = Change in energy]]> 2016-08-21 15:27:54 UTC https://padlet.com/nath113151/l6fkrkmprdfc/wish/119048807 Resistance nath113151 https://padlet.com/nath113151/l6fkrkmprdfc/wish/119049155 - Resistance is the ratio of the voltage applied to the electric current which flows through it
-SI Unit : Ohms (Ω)]]> 2016-08-21 15:42:12 UTC https://padlet.com/nath113151/l6fkrkmprdfc/wish/119049155 nath113151 https://padlet.com/nath113151/l6fkrkmprdfc/wish/119049246 2016-08-21 15:47:02 UTC https://padlet.com/nath113151/l6fkrkmprdfc/wish/119049246 Ohm's Law nath113151 https://padlet.com/nath113151/l6fkrkmprdfc/wish/119049326 - Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

- Ohmic conductors are conductors that obeys Ohm's law and a resistor at constant temperature.

- Non-ohmic conductors are conductors that doesn't obey Ohm's law and a resistor that isn't constant.]]> 2016-08-21 15:50:28 UTC https://padlet.com/nath113151/l6fkrkmprdfc/wish/119049326 Factors That Affect Resistance nath113151 https://padlet.com/nath113151/l6fkrkmprdfc/wish/119049486
  • Material e.g. copper has lower resistance than steel
  • Length - longer wires have greater resistance
  • Thickness - smaller diameter wires have greater resistance
  • Temperature - heating a wire increases its resistance

    • ]]>     2016-08-21 15:57:37 UTC https://padlet.com/nath113151/l6fkrkmprdfc/wish/119049486     Power nath113151 https://padlet.com/nath113151/l6fkrkmprdfc/wish/119051092 - Power is the rate of doing work. It is the amount of energy consumed per unit time.
    - SI Unit : joule per second (J/s)]]>     2016-08-21 16:03:12 UTC https://padlet.com/nath113151/l6fkrkmprdfc/wish/119051092     nath113151 https://padlet.com/nath113151/l6fkrkmprdfc/wish/119051166 2016-08-21 16:06:48 UTC https://padlet.com/nath113151/l6fkrkmprdfc/wish/119051166 Circuit Symbols nath113151 https://padlet.com/nath113151/l6fkrkmprdfc/wish/119051394 2016-08-21 16:15:41 UTC https://padlet.com/nath113151/l6fkrkmprdfc/wish/119051394