P7.2.2 - Energy analysis - electric current Flashcards
1
Q
What are the advantages of electrical energy?
A
- Electrical energy is very easily transferred into other forms
- Electrical energy is very easily transferred over long distances
- Electrical energy is portable
2
Q
What energy does a kettle turn electrical energy into?
A
heat energy
3
Q
What energy does a TV turn electrical energy into?
A
light and sound energy
4
Q
What energy does a car turn electrical energy into?
A
light, sound and heat energy
5
Q
Why is the transfer of electrical energy to heat energy is usually considered a wasted energy trasnfer?
A
As heat is unwanted
6
Q
Explain if this statement is true ‘’Turning off lights when you are not using them saves energy’’
A
- Turning off lights stops electrical energy being transferred to light energy
- As a result, less electrical energy is used by the lights
- This saves money
