# Shared Flashcard Set

## Details

S1-Unit5-Electricity-CFE
Revision for unit 5
24
Physics
Not Applicable
05/09/2011

Term
 What are the two types of electric charges?
Definition
 Positive and negative
Term
 What happens when two like charges come in close contact of each other?
Definition
 They repel each other
Term
 What happens when two opposite charges come in close contact of each other?
Definition
 They attract each other
Term
 What is a conductor?
Definition
 A material that allows the electric current to flow through it easily
Term
 What is an insulator?
Definition
 A material that is poor at conducting electric current
Term
 What are electrons?
Definition
 Negatively charged particles that carry energy around a circuit
Term
 What is a circuit?
Definition
 A complete conducting path, around which electrons can move
Term
 What is meant by current?
Definition
 The flow of electron, i.e. the number of electron passing in the circuit in any one time
Term
 How is current measured?
Definition
 In amperes (A), using and ammeter
Term
 What is voltage?
Definition
 Measure of the energy given to electrons
Term
 How is voltage measured?
Definition
 In volts (V), using a voltmeter
Term
 What is the job of cells?
Definition
 They convert other types of energy into electrical energy
Term
 What is resistance?
Definition
 An opposition to electric current
Term
 What is a resistor?
Definition
 Convert electrical energy into heat energy
Term
 Live wire - Job? Colour?
Definition
 Caries high energy current, brown
Term
 Neutral wire - Job? Colour?
Definition
 Carries low energy current, blue
Term
 Earth wire - Job?-Colour?
Definition
 Safety device, yellow and green
Term
 Household appliances and lights are usually connected inâ€¦
Definition
 Parallel
Term
 How many path for the current is thee in a series circuit?
Definition
 One
Term
 How many path for the current is there in a parallel circuit?
Definition
 More than one
Term
 Is the current the same in all points of a series circuit?
Definition
 Yes
Term
 Is the current the same in all points of a parallel circuit?
Definition
 No, the sum of the currents in the branches is equal to the current through the supply
Term
 Is voltage across components in a series circuit the same?
Definition
 No, the voltage across components in a series circuit adds up to the supply voltage
Term
 Is voltage across components in a parallel circuit the same?
Definition
 Yes
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