3.10 Energy & Power Formulas

Question 1

What are the three formulas for energy?

Answer 1

• Energy (E) = Power (P) x Time (t)
• Energy (E) = Voltage (V) x Current (I) x Time (t)
• Energy (E) = Charge (Q) x Voltage (V)

Question 2

What are the two formulas for power?

Answer 2

• Power (P) = Current (I) x Voltage (V)
• Power (P) = Current squared (I) x Resistance (R)