JEE Main 2020 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 4 September 2020, Shift 1, Physics Q12

Question 12 of 75 in this shift, Physics question 12 of 25.

A battery of 3.0 V is connected to a resistor dissipating 0.5 W of power. If the terminal voltage of the battery is 2.5 V, the power dissipated within the internal resistance is :

(1)0.125 W
(2)0.50 W
(3)0.072 W
(4)0.10 WOfficial answer

Official answer

Option 4

NTA final key (Sep 2020).

Chapter: Current Electricity
Topic: Kirchhoff's Laws
Idea tested: Cell EMF and Internal Resistance

Same idea in other shifts

Asked 10× in all

5 Apr 2026, Shift 2 · Q49When an external resistance of 5 $\Omega$ is connected across terminals of a cell, a current of 0.25 A flows through it. When the 5…EasyNumerical value
8 Apr 2024, Shift 1 · Q40In the given circuit, the terminal potential difference of the cell is :EasySingle correctHas a figure
31 Jan 2024, Shift 2 · Q56In the following circuit, the battery has an emf of 2V and an internal resistance of $\frac{2}{3}\Omega$ . The power consumption in the…MediumNumerical valueHas a figure
11 Apr 2023, Shift 2 · Q59Two identical cells each of emf $1.5\ \mathrm{V}$ are connected in series across a $10\ \Omega$ resistance. An ideal voltmeter connected…MediumNumerical value
27 Jul 2022, Shift 1 · Q41Two sources of equal emfs are connected in series. This combination is connected to an external resistance R. The internal resistances of…MediumSingle correct
30 Jul 2022, Shift 2 · Q24A cell sends a current through a resistance 4 Ω for time t and sends current through another resistance 16 Ω for the same time t.If the…MediumNumerical value
27 Aug 2021, Shift 1 · Q26First, a set of n equal resistors of 10 $\Omega$ each are connected in series to a battery of emf 20 V and internal resistance 10…MediumNumerical value
22 Jul 2021, Shift 2 · Q27In an electric circuit, a cell of certain emf provides a potential difference of 1.25 V across a load resistance of 5 $\Omega$ . However,…EasyNumerical value

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.