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4.9 Assuming that the diodes in the circuits of Fig. P4.9 are

ideal, find the values of the labeled voltages and currents.

+3V

12 ΚΩ

D₁ D₂

Figure P4.9

-OV

6 kn

-3V

(a)

+3V

6 kn

D₁ D₂

-3V

(b)

OV

12 ΚΩ

Fig: 1