current

Created by

isa

Cards (21)

Drift velocity 
The very slow net motion or drift of moving charges in the direction of the steady electric force
Current density 
The current per unit cross-sectional area, with a unit of amperes per square meter (A/m2)
Electric Circuit 
A closed conducting path that allows charges to flow from one point to another continuously
Electric Circuit 
Contains a power supply
Contains a device that dissipates energy
Contains wires that connect all the parts together
Switch 
A control device that can complete or break a circuit it is connected to
A switch is not essential for a circuit to operate, but it is usually included for convenience
Current 
The steady flow of charge, calculated as the rate of flow of charge across a plane given as the cross-section of the conductor
The unit of current is the ampere (A), named after French physicist Andre Marie Ampere
Positive terminal and negative terminal 
The two locations in a cell that must be connected to other components
Closed Circuit 
A complete electric circuit that allows electrons to flow along an uninterrupted path
Open Circuit 
Electrons do not flow through any part of a circuit where there is a gap or break, an opening that does not allow current to flow
Types of Circuits
Series circuit
Parallel circuit
Series Circuit 
An electric circuit that has only one path along which electrons can flow
Parallel circuit 
Each component has its own path for current
Series circuit 
The current decreases when more resistors are added
Adding resistors in parallel
Decreases the total resistance of the circuit
Electrical measuring devices
Voltmeter
Ammeter
Galvanometer
Voltmeter 
High resistance device used to measure voltage
Ammeter 
Low resistance device used to measure current
Galvanometer 
Device used for measuring small amounts of current
George Simon Ohm stated that "Current is directly proportional to the voltage and inversely proportional to the resistance"