Concept-wise Practice

repeated measurements MCQ Questions for Class 9

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Practice Questions

10 questions tagged with repeated measurements.

बार-बार माप लेने पर मान कभी थोड़ा अधिक और कभी थोड़ा कम मिलते हैं। इस अनिश्चितता को कम करने का सर्वोत्तम तरीका क्या है?

Repeated measurements are sometimes slightly high and sometimes slightly low. What is the best way to reduce this uncertainty?

Explanation opens after your attempt
Correct Answer

B. अनेक माप लेकर औसत निकालनाTake several measurements and calculate the mean

Step 1

Concept

The mean of several readings reduces the effect of random error. In exams connect averaging with random variation.

Step 2

Why this answer is correct

The correct answer is B. अनेक माप लेकर औसत निकालना / Take several measurements and calculate the mean. The mean of several readings reduces the effect of random error. In exams connect averaging with random variation.

Step 3

Exam Tip

कई मापों का औसत यादृच्छिक त्रुटि के प्रभाव को कम करता है। परीक्षा में औसत को यादृच्छिक भिन्नता से जोड़ें।

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यदि दो प्रयोग समान औसत देते हैं लेकिन एक में मानों का फैलाव कम है तो कौन सा प्रयोग अधिक परिशुद्ध है?

If two experiments give the same average but one has less spread in its values which experiment is more precise?

Explanation opens after your attempt
Correct Answer

A. कम फैलाव वाला प्रयोगThe experiment with less spread

Step 1

Concept

Less spread indicates closer repeated values and therefore greater precision. In exams connect data spread with precision.

Step 2

Why this answer is correct

The correct answer is A. कम फैलाव वाला प्रयोग / The experiment with less spread. Less spread indicates closer repeated values and therefore greater precision. In exams connect data spread with precision.

Step 3

Exam Tip

कम फैलाव दोहराए गए मानों की अधिक निकटता और उच्च परिशुद्धता दर्शाता है। परीक्षा में फैलाव को परिशुद्धता से जोड़ें।

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यदि प्रयोग में दोहराए गए मान आपस में बहुत निकट हों लेकिन स्वीकृत मान से दूर हों तो क्या निष्कर्ष होगा?

If repeated measurements are close to one another but far from the accepted value what is the correct conclusion?

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Correct Answer

B. कम शुद्धता और उच्च परिशुद्धताLow accuracy and high precision

Step 1

Concept

The values are precise because they are close together but inaccurate because they are far from the accepted value. In exams distinguish the two qualities.

Step 2

Why this answer is correct

The correct answer is B. कम शुद्धता और उच्च परिशुद्धता / Low accuracy and high precision. The values are precise because they are close together but inaccurate because they are far from the accepted value. In exams distinguish the two qualities.

Step 3

Exam Tip

मान आपस में निकट हैं इसलिए परिशुद्ध हैं लेकिन स्वीकृत मान से दूर होने के कारण शुद्ध नहीं हैं। परीक्षा में दोनों गुण अलग रखें।

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यदि किसी प्रयोग में माप बार-बार बहुत अलग आते हैं तो सबसे संभावित समस्या क्या है?

If repeated measurements in an experiment vary greatly what is the most likely problem?

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Correct Answer

B. कम विश्वसनीयताLow reliability

Step 1

Concept

Widely varying repeated results indicate low reliability. In exams close results under the same conditions indicate reliability.

Step 2

Why this answer is correct

The correct answer is B. कम विश्वसनीयता / Low reliability. Widely varying repeated results indicate low reliability. In exams close results under the same conditions indicate reliability.

Step 3

Exam Tip

बार-बार बदलते परिणाम कम विश्वसनीयता दर्शाते हैं। परीक्षा में समान परिस्थितियों में निकट परिणाम विश्वसनीय माने जाते हैं।

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किस स्थिति में औसत निकालना सबसे उपयुक्त है?

In which situation is calculating an average most appropriate?

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Correct Answer

B. एक ही माप के कई दोहराए गए मानों मेंFor several repeated values of the same measurement

Step 1

Concept

The average of repeated measurements of the same quantity gives a representative value. In exams average only comparable values.

Step 2

Why this answer is correct

The correct answer is B. एक ही माप के कई दोहराए गए मानों में / For several repeated values of the same measurement. The average of repeated measurements of the same quantity gives a representative value. In exams average only comparable values.

Step 3

Exam Tip

एक ही राशि के दोहराए गए मापों का औसत प्रतिनिधि मान देता है। परीक्षा में केवल तुलनीय मानों का औसत निकालें।

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प्रयोग में औसत निकालने का लाभ क्या है?

What is the benefit of calculating an average in an experiment?

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Correct Answer

A. कई मापों का प्रतिनिधि मान मिलता हैIt gives a representative value from several measurements

Step 1

Concept

An average summarises several measurements into a representative value. Recognise averages of repeated measurements.

Step 2

Why this answer is correct

The correct answer is A. कई मापों का प्रतिनिधि मान मिलता है / It gives a representative value from several measurements. An average summarises several measurements into a representative value. Recognise averages of repeated measurements.

Step 3

Exam Tip

औसत कई मापों को एक प्रतिनिधि मान में संक्षेपित करता है। परीक्षा में दोहराए गए मापों का औसत पहचानें।

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यदि प्रयोग में कई माप लिए गए हों तो औसत निकालने का लाभ क्या है?

What is the benefit of calculating an average when several measurements are taken?

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Correct Answer

B. प्रतिनिधि मान मिलता हैA representative value is obtained

Step 1

Concept

An average gives a representative value and reduces the effect of small variations. In exams average comparable values.

Step 2

Why this answer is correct

The correct answer is B. प्रतिनिधि मान मिलता है / A representative value is obtained. An average gives a representative value and reduces the effect of small variations. In exams average comparable values.

Step 3

Exam Tip

औसत कई मापों का प्रतिनिधि मान देता है और छोटी भिन्नताओं का प्रभाव कम करता है। परीक्षा में तुलनीय मानों का औसत लें।

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किस स्थिति में औसत निकालना सबसे अधिक उपयोगी होगा?

In which situation would calculating an average be most useful?

Explanation opens after your attempt
Correct Answer

B. एक ही लंबाई के कई दोहराए गए मापों का प्रतिनिधि मान पाने मेंTo obtain a representative value from repeated measurements of the same length

Step 1

Concept

The average of repeated comparable measurements reduces the effect of random variation. In exams average only comparable values.

Step 2

Why this answer is correct

The correct answer is B. एक ही लंबाई के कई दोहराए गए मापों का प्रतिनिधि मान पाने में / To obtain a representative value from repeated measurements of the same length. The average of repeated comparable measurements reduces the effect of random variation. In exams average only comparable values.

Step 3

Exam Tip

दोहराए गए समान मापों का औसत आकस्मिक भिन्नता का प्रभाव कम करता है। परीक्षा में केवल तुलनीय मानों का औसत निकालें।

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एक छात्र ने तीन बार मापन किया और मान प्राप्त हुए बारह दशमलव एक सेंटीमीटर बारह दशमलव दो सेंटीमीटर तथा बारह दशमलव एक सेंटीमीटर। ये मान मुख्यतः क्या दर्शाते हैं?

A student measured three times and obtained values of twelve point one centimetres twelve point two centimetres and twelve point one centimetres. What do these values mainly indicate?

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Correct Answer

A. उच्च परिशुद्धताHigh precision

Step 1

Concept

Repeated values close to one another indicate high precision. In exams connect precision with closeness of repeated values.

Step 2

Why this answer is correct

The correct answer is A. उच्च परिशुद्धता / High precision. Repeated values close to one another indicate high precision. In exams connect precision with closeness of repeated values.

Step 3

Exam Tip

पास-पास के दोहराए गए मान उच्च परिशुद्धता दर्शाते हैं। परीक्षा में परिशुद्धता को मानों की निकटता से जोड़ें।

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यदि माप बार-बार लगभग समान आएँ तो यह किस गुण को दर्शाता है?

If repeated measurements are nearly the same what quality do they show?

Explanation opens after your attempt
Correct Answer

C. परिशुद्धताPrecision

Step 1

Concept

Repeated values that are close to one another show precision. In exams connect closeness of repeated values with precision.

Step 2

Why this answer is correct

The correct answer is C. परिशुद्धता / Precision. Repeated values that are close to one another show precision. In exams connect closeness of repeated values with precision.

Step 3

Exam Tip

बार-बार निकट मान मिलना मापन की परिशुद्धता दर्शाता है। परीक्षा में समानता को परिशुद्धता से जोड़ें।

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