Other Physics · JEE Main previous year questions

2022 52 questions

1. Q482022 · 24 Jun 2022 · Shift 2

   Two light beams of intensities in the ratio of 9 : 4 are allowed to interfere. The ratio of the intensity of maxima and minima will be :

   1. A.2 : 3
   2. B.16 : 81
   3. C.25 : 169
   4. D.25 : 1
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   Answer: D

2. Q592022 · 24 Jun 2022 · Shift 2· Numerical answer

   A sample contains $10^{-2}\mathrm{kg}$ each of two substances A and B with half lives $4\mathrm{s}$ and $8\mathrm{s}$ respectively. The ratio of their atomic weights is $1:2$. The ratio of the amounts of A and B after $16\mathrm{s}$ is $\frac{x}{100}$. The value of x is ____.

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   Answer: 25