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Class 10 Compulsory Science and Technologyकक्षा १० विज्ञान तथा प्रविधि — SEE notes & solutions

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Class 10 SEE Compulsory Science and Technology Question Paper 2080 (SEE) – Solved

NEB

2080

Class 10 (SEE)

Compulsory Science and Technology

Full Marks: 75

Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.

"समूह 'क'"

तलका प्रश्नको ठिक विकल्प छानी उत्तरपुस्तिकामा लेख्नुहोस् : Choose the best alternative of the following questions and write in the answer sheet:

[10×1=10]

"समूह 'ख'"

तलका प्रश्नहरूको अति छोटो उत्तर लेख्नुहोस् : Write very short answers to the following questions:

[9×1=9]

"समूह 'ग'"

तलका प्रश्नहरूको छोटो उत्तर लेख्नुहोस् : Write short answer to the following questions:

[14×2=28]

"समूह 'घ'"

तलका प्रश्नहरूको लामो उत्तर लेख्नुहोस् : Write long answer to the following questions:

[7×4=28]

5.

एउटा विद्युत् सामग्री उत्पादन गर्ने कम्पनीले ट्रान्सफर्मरको माग बजारमा देख्यो ।

An electric material production company saw the demand of transformer in the market.

(i) त्यस कम्पनीले प्राइमरी फन्का 200 र सेकेन्डरी फन्का 100 हुने गरी ट्रान्सफर्मर बनाउँदा कस्तो प्रकारको ट्रान्सफर्मर वन्छ ?

If the company manufactures transformers with number of primary coil 200 turns and secondary coil 100 turns. What type of transformer is formed?

(ii) यदि उक्त कम्पनीले बनाएको ट्रान्सफर्मरमा प्राइमरी फन्कामा 50V DC पठाउँदा सेकेन्डरी फन्कामा कति भोल्ट विद्युत् वग्छ ?

If 50V DC is passed in the primary coil in the transformer manufactured by the company, what will be the secondary voltage?

(iii) उक्त ट्रान्सफर्मरहरूमा इनपुट र आउटपुट इनर्जीविच के सम्बन्ध छ ?

What is the relation between input and output energy in the transformers?

(iv) दैनिक जीवनमा माथिको 'i' नं. मा दिइएको ट्रान्सफर्मरको उपयोगिता के हुन्छ ?

What is the use of transformer given in no. 'i', in our daily life?

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7.

सँगैको तालिकामा तीनओटा आकाशीय पिण्डहरूको गुरुत्वप्रवेग दिइएका छन् :

The acceleration due to gravity of three heavenly bodies are given in the table alongside.

आकाशीय पिण्डहरू Heavenly bodies गुरुत्वप्रवेग Acceleration due to gravity
A 9.8 m/s²
B 25 m/s²
C 1.67 m/s²

(i) ग्रह B को सतहतिर स्वतन्त्र रुपमा खसिरहेको वस्तुले पाँचौँ सेकेन्डमा लिएको गति गणना गर्नुहोस् ।

Calculate the velocity of object falling freely towards the surface of B in 5th second.

(ii) यदि कुनै व्यक्तिले पृथ्वीको सतहमा 50 kg पिण्ड उचाल्न सक्छ भने त्यस व्यक्तिले आकाशीय पिण्ड C को सतहमा कति पिण्ड उचाल्न सक्छ ?

If a man can lift 50 kg mass on the surface of the earth, how much mass can he lift on the surface of C?

(iii) आकाशीय पिण्ड C को सतहमा किन ठुला ठुला खाल्डाहरू पाइन्छन् ?

Why are there big craters on the surface of heavenly body of C?

(iv) यद्यपि वृहस्पतिको पिण्ड पृथ्वीको पिण्डभन्दा 319 गुणा बढी छ, तर यसको गुरुत्वप्रवेग त्यही अनुपातमा बढेको पाईँदैन, किन ?

Although the mass of Jupiter is 319 times of the mass of the earth, but its acceleration due to gravity does not increase in the same ratio, why?

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