निष्पक्ष प्रयोग के लिए एक समय में कितने स्वतंत्र चर बदलने चाहिए?
For a fair experiment how many independent variables should be changed at one time?
Explanation opens after your attempt
B. एकOne
Concept
Changing only one independent variable at a time helps identify its effect. In exams remember the idea of a fair test.
Why this answer is correct
The correct answer is B. एक / One. Changing only one independent variable at a time helps identify its effect. In exams remember the idea of a fair test.
Exam Tip
एक समय में केवल एक स्वतंत्र चर बदलने से उसके प्रभाव को पहचाना जा सकता है। परीक्षा में निष्पक्ष परीक्षण याद रखें।
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