4.2.4.1 Power Flashcards
1
Q
What is the power transfer in any circuit device related to?
A
- related to the potential difference across it and the current through it
- related to the energy changes over time
2
Q
Power:
A
the rate at which energy is transferred
3
Q
What is 1 Watt equivalent to?
A
1 Watt (W) is an energy transfer of 1 J per second
4
Q
What is 1 Ampere equivalent to?
A
1 Coulomb of charge passing a point per second
5
Q
Calculating the power transfer in a circuit device using current and potential difference:
A
6
Q
Calculating the power transfer in a circuit device using current and resistance:
A
7
Q
How might an appliance with a greater power output impact the environment?
A
- greater power
- the rate at which energy is transferred is faster
- more electricity needs to be generated so more fossil fuels are burned to release more energy releasing more GHG’s into the atmosphere like CO2
