Calculating Energy Transfer by Components

Question 1

What is the equation for calculating energy transfer?

Answer 1

E = Q x V
Energy transfer(J)= Charge of flow(c) x potential difference(V)

Question 2

4 coulombs of charge flows in the circuit with a p.d. of 15V. Calculate the total energy transferred.

Answer 2

60J

E = Q x V
Energy transfer(J)= Charge of flow(c) x potential difference(V)
Energy transfer(J)=  4c x  15V
Energy transfer(J)= 60J

Question 3

a total p.d/voltage of 30V in the cell
Resistor A and Resistor B are in series
Resistor B has 25V
3 coulombs of charge flows in the circuit. Calculate the energy transferred in resistor A .

Answer 3

15J

Potential difference is shared between components in series. If resistor B has 25V, Resistor A must have a p.d of 5V
putting this information in the equation to find the total energy transferred in resistor A:
Energy transfer(J) = charge of flow(c) x potential difference(V)
Energy transfer(J) = 3c x 5V= 15J