A-LEVEL Physics: 5.3.3: Electrical Energy & Power (SaveMyExams) Flashcards
1
Q
What is ‘Power’?
A
Power is the Rate of Energy Transfer over Unit Time.
2
Q
What is ‘Potential Difference’?
A
Potential Difference is the Energy Transferred Per Unit Charge.
3
Q
What is ‘Current’?
A
Current is the Rate of Flow of Charge.
4
Q
Power = …
A
Energy Transferred / Time Taken
P = E/t
5
Q
Work Done = …
A
Energy Transferred
Force Applied * Distance Moved
6
Q
Power = …
A
Current * Potential Difference
P=IV
7
Q
Power = …
A
Current^2 * Resistance
P=I^2 R
8
Q
For a given Resistor, if the Current or Voltage Doubles, the Power Will…
A
The Power Will be *4 Greater.
