Learn

Saturday, 31 October

JEE Main 2021 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 31 August 2021, Shift 1, Physics Q21

Question 21 of 90 in this shift, Physics question 21 of 30, Section B.

The voltage drop across 15 Ω\Omega resistance in the given figure will be __________ V.

The figure, in words

Circuit with a 12 V battery and a 1 ohm resistor in series with two parallel branches. Upper branch: a parallel pair of 4 ohm and 4 ohm, in series with a 2 ohm resistor, in series with a parallel pair of 15 ohm and 10 ohm. Lower branch: a parallel pair of 8 ohm and 8 ohm, in series with a parallel pair of 12 ohm and 12 ohm.

Official answer

6

NTA final key.

Chapter
Current Electricity
Topic
Ohm's Law and Resistance
Idea tested
Ohm's Law and V-I Graphs

Same idea in other shifts

Asked 3× in all
  1. 9 Apr 2024, Shift 2 · Q60To determine the resistance (RR) of a wire, a circuit is designed below. The VV-II characteristic curve for this circuit is plotted for…MediumNumerical valueHas a figure
  2. 29 Jun 2022, Shift 1 · Q55The variation of applied potential and current flowing through a given wire is shown in figure. The length of wire is 31.4 cm. The…MediumNumerical valueHas a figure

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.