Physics · 2020
JEE Main · 4 September 2020, Shift 1 · Q6
A air bubble of radius 1 cm in water has an upward acceleration 9.8 cm s^-2. The density of water is 1 gm cm^-3 and water offers negligible drag…
A air bubble of radius $\displaystyle 1$ cm in water has an upward acceleration $\displaystyle 9.8 \mathrm{~cm} \mathrm{~s}^{-2}$. The density of water is $\displaystyle 1 \mathrm{gm} \mathrm{cm}^{-3}$ and water offers negligible drag force on the bubble. The mass of the bubble is $\displaystyle \left(\mathrm{g}=980 \mathrm{~cm} / \mathrm{s}^2\right)$.
Official answer
(3)
4.$\displaystyle 15$ gm
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.