P5.3 Electrical power and potential difference Flashcards
1
Q
What is the equation for power of an appliance?
A
Power = energy transferred/time
2
Q
What is the definition of current?
A
The charge that flows through it each second
3
Q
What is the definition of potential difference?
A
Energy transferred to the appliance by each coulomb of charge that passes through it
4
Q
What is the equation for power supplied?
A
Current x potential difference
5
Q
How can you choose the correct fuse?
A
Calculate the power rating of the appliance and its potential difference
6
Q
What is the equation for the power supplied to the resistor`?
A
P = current^2 x resistance
