JEE Main 2025 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 2 April 2025, Shift 1, Physics Q35

Question 35 of 75 in this shift, Physics question 10 of 25, Section A.

The battery of a mobile phone is rated as 4.2 V, 5800 mAh. How much energy is stored in it when fully charged ?

(1)24.4 kJ
(2)87.7 kJOfficial answer
(3)48.7 kJ
(4)43.8 kJ

Official answer

Option 2

NTA final key.

Chapter: Current Electricity
Topic: Ohm's Law and Resistance
Idea tested: Electrical Energy Consumption Units

Same topic in other shifts

All Ohm's Law and Resistance questions

5 Apr 2026, Shift 2 · Q27In an experiment to determine the resistance of a given wire using Ohm's law, the voltmeter and ammeter readings are noted as 10 V and 5…EasySingle correct
3 Apr 2025, Shift 2 · Q39A motor operating on 100 V draws a current of 1 A. If the efficiency of the motor is 91.6%, then the loss of power in units of cal/s isEasySingle correct
4 Apr 2025, Shift 2 · Q36There are 'n' number of identical electric bulbs, each is designed to draw a power p independently from the mains supply. They are now…EasySingle correct
6 Apr 2024, Shift 2 · Q43The number of electrons flowing per second in the filament of a 110 W bulb operating at 220 V is : (Given $e=1.6\times10^{-19}\ \mathrm{C}$ )EasySingle correct
8 Apr 2024, Shift 1 · Q56Resistance of a wire at $0\,^\circ$ C, $100\,^\circ$ C and $t\,^\circ$ C is found to be $10\ \Omega$ , $10.2\ \Omega$ and $10.95\ \Omega$ …MediumNumerical value
9 Apr 2024, Shift 2 · Q55At room temperature ( $27^\circ$ C), the resistance of a heating element is $50\ \Omega$ . The temperature coefficient of the material is…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 42 of the 174 JEE Main shifts held from 2017 to 2026.