Electric Circuits Flashcards
(13 cards)
What are insulators?
Insulators prevent heat or electricity loss, it will not permit the transfer of energy. Eg: rubber, plastic, wood, glass
What are conductors?
They let heat or electricity pass through. Mostly they are metal apart from graphite. Conductors permit the transfer of energy in a number of forms eg. Thermal, electrical and sound. Examples: aluminium rod, silver, gold, tin,foil, nail
What is a unit of measure for electric current, what is its symbol, how do you measure it?
Coloumbs per second or Amp,symbol A, measured using an ammeter.
What is electric current?
The flow of energy
Other information about electric currents?
.It has the same value at all points in a series circuit.
.Depends on the number and voltage of cells and the number and nature of other components in he circuit
.The current does not get used up by he circuit, just the energy that the electrons are carrying.
What is voltage?
The energy carried by each coulomb of charge from the power supply to the other components in the circuit..it is the energy of a circuit. In water model, the pump makes water move, gives it energy like a cell giving electrical current in a circuit. The flow of water is the current. The waterfall is where energy gets used up. The voltage is the amount of energy in the flow.
In electrical voltage, what is resistance?
?
What is the safe wiring of a 13 amp plug?
? Can’t see it in your notes, do you know Rosa?
How is voltage measured?
In Joules per coulomb or volts (v) and using a voltmeter.
How do you measure voltage?
With a voltmeter. It is attached parallel to whatever is being measured. In Joules per coulomb or volts (v).
How do you measure amps (current.)
With an ammeter. It is attached anywhere in a circuit.
Is the current used up in a circuit?
The current does not get used up by he circuit, just the energy that the electrons are carrying.
Is the current (measured by an ammeter) the same all the way through?
Yes the current has the same value at all points in a series circuit. In a parallel it is different, depending on how many different sections there are.
