Current Flashcards
(18 cards)
What is an Electrical current
Electrical current is the movement of negative particles ( electrons ) around an electric circuit
What four things are needed for an electric circuit
1- A source of energy
2-A conductor
3-A load where electrical potential energy is converted into other forms of energy such as heat, sound and light
4- A switch
Current is measured in ________ or _____________
Ampere (A) or Milliamperes (mA)
Current is measured using an __________
Ammeter
Should the ammeter be connected in series or parallel
Series, because it measures the current flowing in the circuit
The amount of electrical potential energy, in joules, lost by each unit of charge in a given part of the circuit is called _____________-_______________
Voltage-drop
How is voltage drop measure and in what measurement
Voltmeter, Volts (V)
Should the voltmeter be connected in series or parallel
Parallel, because it measures the voltage drop across a component
The ammeter is connected in_________ and measures________ in _______
Series, current, Amp(A)
The voltmeter is connected in ________ and measures_________ in__________
Parallel, voltage drop, Volts (V)
If two globes are arranged in a single line what are they
Series
In Series circuits what happens to the current and voltage
the current through each globe is the same, But the voltage is shared between each globe.
What happens if a globe is removed or broken.
The circuit is broken and doesn’t work
What is it called when two globes are arranged on separate branches
They are called parallel
In a Parallel circuit what happens to the current and voltage.
The current is split between the branches, but the voltage supplied to each globe is the same.
In a series circuit what happens when a globe is added
The other globes dim slightly, because the voltage is shared
In a parallel circuit what happens when another globe is added
The brightness of all the globes stays the same
In a parallel circuit what would happen if a globe was removed
Nothing it wouldn’t affect the other globes.
