एक प्रयोग में पौधों को अलग मात्रा में जल दिया गया लेकिन प्रकाश की मात्रा भी अलग थी। मुख्य समस्या क्या है?
In an experiment plants received different amounts of water but also different amounts of light. What is the main problem?
Explanation opens after your attempt
D. एक से अधिक कारक बदले गएMore than one factor was changed
Concept
Changing both water and light makes the true cause of the result unclear. In exams keep one independent variable for a fair test.
Why this answer is correct
The correct answer is D. एक से अधिक कारक बदले गए / More than one factor was changed. Changing both water and light makes the true cause of the result unclear. In exams keep one independent variable for a fair test.
Exam Tip
जल और प्रकाश दोनों बदलने से परिणाम का वास्तविक कारण स्पष्ट नहीं होगा। परीक्षा में निष्पक्ष जाँच के लिए एक स्वतंत्र चर रखें।
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