Other Physics · JEE Advanced previous year questions

5 questions asked across 3 exam years, newest first

2025 3 questions

Q242025 · 18 May 2025 · Paper 1· Numerical answer
A person sitting inside an elevator performs a weighing experiment with an object of mass 50 kg. Suppose that the variation of the height $y$ (in m) of the elevator, from the ground, with time $t$ (in s) is given by $y = 8 [1 + sin (\frac{2 π t}{T})]$ , where $T = 40 π$ s. Taking acceleration due to gravity, $g = 10 m/ s^{2}$ , the maximum variation of the object’s weight (in N) as observed in the experiment is ____
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Answer: 2
Q262025 · 18 May 2025 · Paper 1· Numerical answer
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Answer: 3
Q202025 · 18 May 2025 · Paper 2
Consider a star of mass $m_{2}$ kg revolving in a circular orbit around another star of mass $m_{1}$ kg with $m_{1} ≫ m_{2}$ . The heavier star slowly acquires mass from the lighter star at a constant rate of $γ$ kg/s. In this transfer process, there is no other loss of mass. If the separation between the centers of the stars is $r$ , then its relative rate of change $\frac{1}{r} \frac{d r}{d t}$ (in $s^{- 1}$ ) is given by:
1. A. $- \frac{3 γ}{2 m _{2}}$
2. B. $- \frac{2 γ}{m _{2}}$
3. C. $- \frac{2 γ}{m _{1}}$
4. D. $- \frac{3 γ}{2 m _{1}}$
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Answer: Dropped in the final answer key (full marks to everyone)