In order to receive full credit Show formulas and all work w

In order to receive full credit Show formulas and all work when doing the problems Use only the method specified for solving problems Do all of your work in the blue books provided Given the circuit below find I_R1, V_R2, P_R1, P_D1, P_D2, P_D3, and I_R2.

Solution

voltage drop at each diode is 0.7V => (say Vd )drop aross the total of 3 diodes =3*0.7 = 2.1 V

voltage acroos R1= 15- Vd =12.9V

Ir1= (15-2.1 )/1290 = 0.01A

since voltages in parallel are equal Vd= Vr2=2.1V

Ir2= Vr2/R2 = 4.2*10^-5A

current through diodes=> 0.01-(4.2*10^-5) =9.958*10^-3A

PD1=PD2=PD3= Vd*9.958*10^-3 = 6.9706*10^-3 watts