Physics · 2021
JEE Main · 24 February 2021, Shift 2 · Q25
Two cars are approaching each other at an equal speed of 7.2 km / hr. When they see each other, both blow horns having frequency of 676 Hz. The beat…
Two cars are approaching each other at an equal speed of $\displaystyle 7.2 \mathrm{~km} / \mathrm{hr}$. When they see each other, both blow horns having frequency of $\displaystyle 676$ Hz . The beat frequency heard by each driver will be \_\_\_\_ Hz. [Velocity of sound in air is $\displaystyle 340 \mathrm{~m} / \mathrm{s}$.]
Official answer
8
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.