For the following ciruit find the values of R1 to satisfy ea

For the following ciruit, find the values of R1, to satisfy each of the following condtions:

V = 4 V V = 12 V I = 2 A The power,P_1 dissipated in R_1 is 20 W. (There are two possible values for R_1. Find both.)

Solution

if,

V = 4V

I = 2A

R₁ = V/I = 4/2 = 2 ohms

if V = 12V,

I = 2A

R₁ = V/I = 6 ohms

power = i²Rt = 4x4xt = 16t (time dependent)