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Saturday, 31 October

JEE Main 2020 · PhysicsMultiple choiceSingle correctMediumConceptual

JEE Main 3 September 2020, Shift 2, Physics Q20

Question 20 of 75 in this shift, Physics question 20 of 25.

Which of the following will NOT be observed when a multimeter (operating in resistance measuring mode) probes connected across a component, are just reversed ?
  1. (1)Multimeter shows an equal deflection in both cases i.e. before and after reversing the probes if the chosen component is resistor.
  2. (2)Multimeter shows NO deflection in both cases i.e. before and after reversing the probes if the chosen component is capacitor.Official answer
  3. (3)Multimeter shows NO deflection in both cases i.e. before and after reversing the probes if the chosen component is metal wire.
  4. (4)Multimeter shows a deflection, accompanied by a splash of light out of connected component in one direction and NO deflection on reversing the probes if the chosen component is LED.

Official answer

Option 2

NTA final key (Sep 2020).

Chapter
Current Electricity
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.