JEE Main 2021PhysicsSemiconductorsHardMCQ

JEE Main 2021 — Semiconductors Question with Solution

JEE Main 2021 (01 Sep Shift 2)

Question

In the given figure, each diode has a forward bias resistance of 30 Ω and infinite resistance in reverse bias. The current I1 will be :

Choose an option

Show full solutionCorrect option: A
Correct answer
A2.0 A

Step-by-step explanation

We know that in reverse bias ideal diode does not pass current it only works in forward bias so, the current in the third branch is zero, it means the net resistance of the upper two branch is, 1Req=1160+1160⇒Req=80 Ω

⇒R'eq=80+20=100 Ω

⇒i=200100=2 A

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About this question

This is a previous-year question from JEE Main 2021, covering the Semiconductors chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.