Static Electricity
If an object gains electrons it becomes:
Negatively charged
Define current and what is it measured in
the rate at which electric charge (typically electrons) flows past a specific point in a complete circuit, measured in amperes.
Using a 5 cm piece of wire rather than a 2 cm piece of wire will do this to the resistance.
What is increase it?
The symbol for a bulb.
What is...
another name for battery
What is a source?
Why can't metal objects cause a static electricity charge?
They disperse the electrons
If a circuit is correctly put together, a load will not operate if the circuit is
What is open?
Describe how resistance affects the flow of electrons in a circuit.
Resistance opposes the flow of electrons in a circuit, acting as a, hindrance that reduces the current
Because the balloon is an insulator
What is different about the way that an anmeter and a voltmeter need to be connected to a circuit? (Draw a diagram)
Anmeters series while voltmeters are in parallel
Two wires are made of the same material, but one is longer and thinner. Which wire has more resistance? Explain why.
Explain it
The symbol for a resistor in a circuit
what is..
a negatively charged balloon and a neutral wall will...
The four basic components required for a working circuit
What are Switch, load, source, and connectors ?
Compare what happens to current in:
● A series circuit when another bulb is added
● A parallel circuit when another bulb is added
Adding a bulb in a series circuit increases total resistance, causing the current to decrease and bulbs to dim.
Conversely, adding a bulb in a parallel circuit decreases total resistance, increasing the total current drawn from the source while individual bulb brightness remains unaffected
the symbol for current
What is A for Amps?
Tungsten is used in light bulb filaments because it has higher resistance than copper. Explain how higher resistance helps produce light and heat.
As the filament gets extremely hot it begins to emit light, a process called incandescence
Why do electrons move when you rub a balloon in your hair?
Friction
Why must an ammeter be placed in series but a voltmeter placed in parallel
Ammeters are placed in series because they have very low resistance, allowing them to measure total current without limiting flow, whereas voltmeters are placed in parallel because they have very high resistance
This is the unit for measuring resistance.
What is an ohm?
Why does a series circuit stop working if one bulb burns out, but a parallel circuit does not?
A series circuit stops working if one bulb burns out because it forms a single, continuous loop; a broken bulb acts as an open switch, breaking the entire circuit. A parallel circuit continues to function because it offers multiple, independent paths, allowing electricity to bypass the broken component and keep others powered
Explain why adding more loads increases total resistance in a series circuit but decreases total resistance in a parallel circuit.
Adding loads (resistors/components) increases total resistance in a series circuit because the current is forced through each component sequentially, adding to the total path resistance
In a parallel circuit, more loads create additional paths for current, lowering the overall resistance because it becomes easier for charge to flow