More on power

Question 1

When electrical charge goes through a change in PD

Answer 1

Energy is transferred

Energy is supplied to the charge at the power source to raise it through a potential

this means battery with bigger pd will supply more energy to the circuit for every columb of charge which flows round it because charge is raise up higher at the start

Question 2

3 formulas

Answer 2

E = QV
P = VI
P = I^2R