Current Electricity Gr.9 Flashcards
List 3 examples of electrical energy sources.
- Batteries
- Solar panels
- Windmills
What is an electrical load?
It is anything that converts electrical energy into another form of energy.
Examples: Light bulb, Toaster.
What is an electric circuit control device?
It is a component that regulates or manages the flow of electricity within a circuit.
Examples: Switch, circuit breaker.
What is a connector?
It is a conductor that provides the path for the electric current.
Example: wires.
Electrons always go towards the _____ side of the battery.
positive
What is an ammeter?
An ammeter is a device used to measure how much charge passes a certain point in one second. It is measured in amperes.
What are the 4 parts of an electric circuit?
- A source of electrical energy, 2. an electrical load or resistor, 3 a control device, and 4. connectors.
How is electric current measured?
Electric current is measured as the amount of potential energy that passes a point on a conducting wire every second.
What are Amperes?
Amperes are the unit used to measure current.
What is the “Magic Triangle”?
The magic triangle helps remember Ohm’s Law by organizing voltage (V), current (I), and resistance, (R).
You can plug in numbers like this:
V = I × R, I = V ÷ R, or R = V ÷ I
What does a resistor do?
A resistor limits or regulates the flow of electrical current in a circuit. It can also be used to provide a specific voltage for an active device.
What does a variable resistor do?
The Variable Resistor is a device that allows you to adjust the current in your circuit by changing the amount of resistance.
What is a fuse in a circuit?
A fuse is an electrical safety device that protects the circuit from overload.
What does a voltmeter measure?
A voltmeter measures potential difference. It must be connected in parallel parts of the circuit. It is measured in volts.
What is potential difference?
Potential difference is the difference in potential energy between two points in a circuit.
What happens when electrons re-enter the battery?
A chemical reaction re-energizes them and sends them out again.
What is a series circuit?
A series circuit is a circuit in which all circuit elements are arranged in a single path.
What is this symbol and its component in a circuit?
It is a single cell battery and is a source of electricity.
What is this symbol and its component in a circuit?
It is a 2 cell battery and is a source of electricity.
What are these symbols and their components in a circuit?
The symbol on top is an open switch (off), and the one on the bottom is a closed switch (on). They are both control devices.
What are these symbols and their component in a circuit?
They are both fuses. They are both control devices.
What is this symbol and its component in a circuit?
It is a circuit breaker and is a control device.
What is this symbol and its component in a circuit?
It is a lightbulb and is an electrical load.
What is this symbol and its component in a circuit?
It is a resistor and is an electrical load.
