JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 26 July 2022, Shift 1, Physics Q38

Question 38 of 90 in this shift, Physics question 8 of 30, Section A.

A charge particle is moving in a uniform magnetic field

\left(2\hat{i} + 3\hat{j}\right)

T. If it has an acceleration of

\left(\alpha\hat{i} - 4\hat{j}\right)\ \mathrm{m/s^2}

, then the value of

\alpha

will be :

(1)3
(2)6Official answer
(3)12
(4)2

Official answer

Option 2

NTA final key.

Chapter: Moving Charges and Magnetism
Topic: Lorentz Force
Idea tested: Magnetic Force Vector Calculation

Same idea in other shifts

Asked 7× in all

2 Apr 2026, Shift 1 · Q48 $1\ \mu$ C charge moving with velocity $\vec v=\left(\hat i-2\hat j+3\hat k\right)$ m/s in the region of magnetic field…EasyNumerical value
5 Apr 2026, Shift 1 · Q49The charged particle moving in a uniform magnetic field of $(3\hat{i} + 2\hat{j})\,\mathrm{T}$ has an acceleration…MediumNumerical value
28 Jul 2022, Shift 2 · Q12A triangular shaped wire carrying 10 A current is placed in a uniform magnetic field of 0.5 T, as shown in figure. The magnetic force on…EasySingle correctHas a figure
25 Feb 2021, Shift 1 · Q15A proton, a deuteron and an $\alpha$ particle are moving with same momentum in a uniform magnetic field. The ratio of magnetic forces…MediumSingle correct
8 Jan 2020, Shift 1 · Q12Proton with kinetic energy of 1 MeV moves from south to north. It gets an acceleration of $10^{12}$ m/s $^2$ by an applied magnetic field…MediumSingle correct
3 Sep 2020, Shift 1 · Q2A charged particle carrying charge 1 $\mu$ C is moving with velocity $(2\hat{i} + 3\hat{j} + 4\hat{k})$ ms $^{-1}$ . If an external magnetic…EasySingle correct

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.