In the diode circuit shown, each forward-biased diode has resistance 25 Ω. Which relation between the labelled currents is correct?

Question

G1 Physics · Accepted Answer

From the battery polarity, D₁ and D₃ are forward biased while D₂ is reverse biased. The conducting branches containing D₁ and D₃ have equal resistance, so the incoming current divides equally into the two identical conducting paths. Thus the total current I₁ is twice the current in either identical branch: I₁ = 2I₂ Therefore, I₁/I₂ = 2 Hence option A follows.