Three resistors of 10 Ω, 20 Ω and 30 Ω are connected in series to 120V DC supply.

Calculate:

• total resistance                               R_T = 
  W

  V

  A

  Ω 
• circuit current                                  I_T = 
  W

  A

  V

  Ω 
• total power consumed                      P_T = 
  W

  A

  V

  Ω 
• voltage drop across the 20 Ω resistor   V₂₀ = 
  Ω 

  V

  W

  A