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Saturday, 31 October

JEE Main 2023 · PhysicsMultiple choiceOtherMediumCalculation

JEE Main 15 April 2023, Shift 1, Physics Q49

Question 49 of 90 in this shift, Physics question 19 of 30, Section A.

For designing a voltmeter of range 50 V and an ammeter of range 10 mA using a galvanometer which has a coil of resistance 54 Ω\Omega showing a full scale deflection for 1 mA as in figure. (A) for voltmeter R≈50 kΩR \approx 50\,\mathrm{k}\Omega (B) for ammeter r ≈\approx 0.2Ω\Omega (C) for ammeter r = 6Ω\Omega (D) for voltmeter R≈5 kΩR \approx 5\,\mathrm{k}\Omega (E) for voltmeter R≈R \approx 500 Ω\Omega Choose the correct answer from the options given below:

The figure, in words

Two circuits. Top (voltmeter): a galvanometer G (54 ohm, 1 mA current marked) in series with a resistor R and a 50 V source. Bottom (ammeter): a galvanometer G (54 ohm, 1 mA current marked) with a shunt resistor r connected in parallel across it.
  1. (1)(A) and (C)Official answer
  2. (2)(A) and (B)
  3. (3)(C) and (D)
  4. (4)(C) and (E)

Official answer

Option 1

NTA final key.

Chapter
Moving Charges and Magnetism
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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.