That's Entertainment - Electricity Section Flashcards
OUTCOMES • Describe voltage, current and resistance • Describe qualitatively the relationship between voltage, current and resistance • Compare the characteristics and applications of series and parallel circuits • Discuss, using examples how developments in electronics have changed technology and identify some applications
What are the advantages of using a parallel circuit?
Advantages:
- if one globe blows the other globes can still work
- more than one pathway for electrons
- the voltage is the same for different components in the circuits
What are the disadvantages of using a series circuit?
Disadvantages:
- A turned off or broken bulb will not allow other bulbs to low
- Only one pathway for electrons
- An extra bulb makes the others less bright
- Cannot control the bulbs individually
What are the disadvantages of using a parallel circuit?
Disadvantages
- More subject to fire in some cases.
- increasing the number of output devices does not increase the resistance like it does in series.

What is the unit of voltage?
Volts = V
What does voltage measure?
The amount of electrical potential energy. Voltage is the difference in charge between two points.
What would happen if a bulb was removed in a parallel circuit?
The other bulbs would continue glowing and the brightness of the bulbs would be greater than they were before.
How are voltage, resistance and flower an analogy to a water tank?
Water = Charge
Pressure = Voltage
Flow = Current
Hose width = Resistance
What is the unit for current?
Ampemeters = Amps = I
What does current measure?
The amount of electric charge (electrons)flowing through the circuit over a period of time.
What is the unit for resistance?
ohms = R
How is resistance provided?
Through the globe or resistors.
What does resistance measure?
How difficult it is for electrons to flow through something.
The circuit with the higher resistance will allow less charge to flow, meaning the circuit with HIGHER RESISTANCE has LESS CURRENT flowing through it.
What is the equation for OHM’s Law?
V (voltage) = I (current) x R (resistance
What does the ohm’s law mean for the relationship between the current/voltage
Doubling the voltage = doubling the current
• Tripling the voltage = tripling the current etc.
What happens if you increase the resistance of a circuit and need to keep the current constant?
Then you have to also increase the voltage to maintain a constant current.
