Union by rank optimisation

I did not understand what difference will it make.
How connecting smaller component with the bigger one, optimize the union operation and vice versa?
Please explain.

Hi @anuragdeol2017
I suggest u to go through the video lectures once again as sir has already explained everything over there… it would be difficult to explain everything over here…

hi @anuragdeol2017
if u still face any difficulty or have any issues in code u can let me know…

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I watched the lecture again. But still did not get, how connecting smaller component with larger, optimize the union operation. Please explain me that.