JEE Main 2021 · PhysicsMultiple choiceSingle correctEasyConceptual

JEE Main 17 March 2021, Shift 2, Physics Q6

Question 6 of 90 in this shift, Physics question 6 of 30, Section A.

Two particles A and B of equal masses are suspended from two massless springs of spring constants

\mathrm{K_1}

and

\mathrm{K_2}

respectively. If the maximum velocities during oscillations are equal, the ratio of the amplitude of A and B is

(1) $\frac{\mathrm{K_1}}{\mathrm{K_2}}$
(2) $\sqrt{\frac{\mathrm{K_1}}{\mathrm{K_2}}}$
(3) $\frac{\mathrm{K_2}}{\mathrm{K_1}}$
(4) $\sqrt{\frac{\mathrm{K_2}}{\mathrm{K_1}}}$ Official answer

Official answer

Option 4

NTA final key.

Chapter: Oscillations
Topic: SHM Equations
Idea tested: Springs in Parallel

Same idea in other shifts

Asked 5× in all

6 Apr 2023, Shift 1 · Q43A mass m is attached to two strings as shown in figure. The spring constants of two springs are $K_1$ and $K_2$ . For the frictionless…EasyDiagram basedHas a figure
25 Jul 2022, Shift 1 · Q39In figure (A), mass '2 m' is fixed on mass 'm' which is attached to two springs of spring constant k. In figure (B), mass 'm' is attached…MediumDiagram basedHas a figure
24 Feb 2021, Shift 2 · Q7In the given figure, a body of mass M is held between two massless springs, on a smooth inclined plane. The free ends of the springs are…MediumDiagram basedHas a figure
25 Feb 2021, Shift 2 · Q7Two identical springs of spring constant ‘2k’ are attached to a block of mass m and to fixed support (see figure). When the mass is…EasyDiagram basedHas 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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.