Physics chapter 4/5 Flashcards

16300592684	Parallel circuit	An electric circuit with two or more paths through which charge can flow	0
16300592685	Series circuit	An electric circuit with only one path through which charge can flow	1
16300592686	Current	A flow of electric charge.	2
16300592687	Potential difference	Energy per unit charge	3
16300592688	Resistance	The amount of obstruction to charge	4
16300592689	Ammeter	Equipment used to measure current	5
16300592690	Voltmeter	Equipment used to measure potential difference	6
16300592691	Amps	Unit of current	7
16300592692	Volts	Unit of potential difference	8
16300592693	Ohm	Unit of resistance	9
16300592720	I-V Characteristic for Ohmic Conductor		10
16300592721	I-V Characteristic for Filament Lamp		11
16300592722	I-V Characteristic for Diode		12
16300592694	Power	A measure of the rate at which energy is transferred or work is done	13
16300592695	Direct current	A continuous electric current that flows in one direction only. Current supplied by cells and batteries.	14
16300592696	Alternating current	A continues electric current that periodically reverses direction, e.g. mains electricity in the UK	15
16300592697	Electrical potential	The potential difference between the point and some other reference point.	16
16300592698	Efficiency	The ratio or percentage of useful energy out compared to total energy in for a system or device	17
16300592723	Three-pin plug		18
16300592699	Colour of live wire	Brown	19
16300592700	Colour of earth wire	Yellow and green	20
16300592701	Colour of neutral wire	Blue	21
16300592702	Fuse	A safety device inside a plug that contains a wire that melts if current becomes too high	22
16300592703	Cable grip	The part of a plug that secures the three-core cable in place	23
16300592704	National Grid	The network of high voltage power lines and transformers that connects major power stations, businesses and homes	24
16300592705	Transformers	A device that transfers an alternating current from one circuit to another to change potential difference	25
16300592706	Step-up transformer	Devices that increase potential difference	26
16300592707	Step-down transformer	Devices that decrease potential difference	27
16300592708	Location of live wire in a plug	To the right	28
16300592709	Location of earth wire in a plug	To the top	29
16300592710	Location of neutral wire in a plug	To the left	30
16300592711	Frequency of mains electricity	50 Hz	31
16300592712	Potential different of mains electricity in the UK	230 V	32
16300592713	Current =	Charge flow / time	33
16300592714	Potential difference =	Current x resistance	34
16300592715	Power =	Current x potential difference	35
16300592716	Energy =	Charge flow x potential difference	36
16300592717	Time =	Energy / Power	37
16300592718	Resistance =	Power / (current)^2	38