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reliable observation MCQ Questions for Class 9

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2 questions tagged with reliable observation.

Question 1/2 Hard Science Exploration: Entering the World of Secondary Science Scientific questions and observations Class 9 Level 6

एक छात्र ने तापमापी को गर्म जल में रखा और तुरंत मान लिख लिया। अधिक विश्वसनीय अवलोकन के लिए क्या करना चाहिए था?

A student placed a thermometer in hot water and recorded the value immediately. What should have been done for a more reliable observation?

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Correct Answer

B. मान स्थिर होने तक प्रतीक्षा करनाWait until the reading becomes stable

Step 1

Concept

Temperature is read more reliably after the thermometer reading becomes stable. In exams allow the instrument time to reach equilibrium.

Step 2

Why this answer is correct

The correct answer is B. मान स्थिर होने तक प्रतीक्षा करना / Wait until the reading becomes stable. Temperature is read more reliably after the thermometer reading becomes stable. In exams allow the instrument time to reach equilibrium.

Step 3

Exam Tip

तापमापी का मान स्थिर होने पर तापमान अधिक विश्वसनीय रूप से पढ़ा जाता है। परीक्षा में उपकरण को संतुलन तक पहुँचने का समय दें।

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Question 2/2 Medium Science Exploration: Entering the World of Secondary Science Scientific questions and observations Class 9 Level 6

किस स्थिति में अवलोकन अधिक विश्वसनीय होगा?

In which situation will an observation be more reliable?

Explanation opens after your attempt
Correct Answer

D. मानक उपकरण से कई बार मापने परWhen measuring several times with a standard instrument

Step 1

Concept

A standard instrument and repetition increase measurement reliability. In exams look for both proper tools and repetition.

Step 2

Why this answer is correct

The correct answer is D. मानक उपकरण से कई बार मापने पर / When measuring several times with a standard instrument. A standard instrument and repetition increase measurement reliability. In exams look for both proper tools and repetition.

Step 3

Exam Tip

मानक उपकरण और दोहराव मापन की विश्वसनीयता बढ़ाते हैं। परीक्षा में उपकरण और पुनरावृत्ति दोनों देखें।

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