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light experiment MCQ Questions for Class 9

light experiment se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

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2 questions tagged with light experiment.

Question 1/2 Medium Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

दीपक और प्रकाश तीव्रता वाले प्रयोग में कौन सा नियंत्रित चर सबसे उपयुक्त है?

Which is the most suitable controlled variable in an experiment on lamp distance and light intensity?

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Correct Answer

D. उसी दीपक का उपयोगUse of the same lamp

Step 1

Concept

Different lamps may produce different power so the same lamp should be used. In exams check apparatus consistency.

Step 2

Why this answer is correct

The correct answer is D. उसी दीपक का उपयोग / Use of the same lamp. Different lamps may produce different power so the same lamp should be used. In exams check apparatus consistency.

Step 3

Exam Tip

अलग दीपक अलग शक्ति दे सकते हैं इसलिए वही दीपक उपयोग करना चाहिए। परीक्षा में उपकरण की समानता जाँचें।

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Question 2/2 Easy Science Exploration: Entering the World of Secondary Science Hypothesis and experimentation Class 9 Level 8

कौन सा कारक पौधे के प्रकाश प्रयोग में नियंत्रित चर हो सकता है?

Which factor may be a controlled variable in a plant light experiment?

Explanation opens after your attempt
Correct Answer

A. पानी की मात्राAmount of water

Step 1

Concept

If light is being changed the amount of water can be kept constant. Choose fixed factors other than the main variable.

Step 2

Why this answer is correct

The correct answer is A. पानी की मात्रा / Amount of water. If light is being changed the amount of water can be kept constant. Choose fixed factors other than the main variable.

Step 3

Exam Tip

यदि प्रकाश बदला जा रहा है तो पानी की मात्रा समान रखी जा सकती है। परीक्षा में मुख्य चर के अलावा स्थिर कारक चुनें।

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