energy and voltage in circuits

Question 1

What is the equation for energy transferred in an electrical circuit?

Answer 1

Energy (E) = Charge (Q) × Voltage (V)

Question 2

A charge of 10 C moves through a component with 5 V across it. How much energy is transferred?

Answer 2

E = 10 × 5 = 50 J

Question 3

What does voltage represent in a circuit?

Answer 3

Voltage is the energy transferred per unit charge (1 V = 1 J/C).