Section 5 Electricity Flashcards
What is a current
Electric charge flowing around a circuit
What is current measured in
Amps
EMF equation
Work done/ charge
Current equation
Charge/time
Resistance equation
Potential difference/current
Electrical power equation
Current x potential difference
Energy transferred equation
Current x potential difference x time
Energy transferred equation with power
Power x time
Cost equation
Energy x price
Which direction does conventional current flow in
Positive to negative
How should a voltmeter be connected in a circuit to measure the pd
Parallel
Potential difference meaning
Amount of work done
Emf meaning
The measure of the electrical work done moving each unit of charge around a circuit
How to calculate source emf
Is shared
V1+v2
When is current shared
Between branches
