Chapter 9.10 - Electrical Energy & Power

Question 1

What are the equations for power

Answer 1

• P = IV
• P = I^2R
• V=IR
• P = I x (IR)

• P = V^2 / R

• I= V / R
• P = (V / R) x V

Question 2

What is the derivation of P = IV

Answer 2

• P = W / t

• V = W / Q
-W = VQ

• P = VQ / t
-Q/t = I

Question 3

How do you calculate energy transferred

Answer 3

• P = W / t
-W = Pt

• P = IV
• W = IVt