National Science Olympiad Forum By SOF Olympiad Trainer - Page 493
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Pratyay Sarkar from South Point High School, Kolkata
Subject :NSO    Class : Class 7

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Gauri Singh from St Johns School Marhauli, Varanasi
Subject :NSO    Class : Class 6

Ans 1:

Mridul Jain from Shishukunj International School Indore, Indore
Class : Class 9
The answer is B as loudspeakers use electromagnets and the magnetic field isn't there always .

Ans 2:

Smita De from Bishop Cotton Girls School, BANGALORE
Class : Class 6
answer is B so obvious

Ans 3:

Shayan Bari from Kendriya Vidyalaya, Katihar
Class : Class 7
Loudspeakers use electromagnets.

Ans 4:

satwik patnaik from DPS Rourkela, Rourkela
Class : Class 7
answer should be b

Ans 5:

Tamrashi Pani from National Public School, Bangalore
Class : Class 8
But all of them use permanent magnets...so D is correct

Ans 6:

Aarush Mallya from EISB, BANGALORE
Class : Class 5
Loud speakers use permanent magnets

Ans 7:

Sharmi Chowdhury from G.D Birla Centre For Education , Kolkata
Class : Class 7
Don't loudspeakers use electromagnets?

Ans 8:

Veda Dua from Delhi Public School, R. K. Puram, New Delhi
Class : Class 10
Loudspeakers use electromagnets, so the answer is option B

Ans 9:

Joe Bipin from National Public School Agra, Bangalore
Class : Class 10
they use both so the answer is d

Ans 10:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9

Ans 11:

SOUVAGYA SAHA from De Nobili School, DHANBAD
Class : Class 10

Ans 12:

NISHTHA GUPTA from DPS R K Puram, newdelhi
Class : Class 10
answer will be b as loudspeakers use electromagents

Ans 13:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9
Loudspeakers use electromagnets so it should be answer b

Ans 14:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9
Loudspeakers use electromagnets.So,the answer should be (B)

Ans 15:

Joe Bipin from National Public School Agra, Bangalore
Class : Class 10
loud speakers have both electromagnets and permanent magnets

Ans 16:

Shreya Yegna Narayanan from psbb, chennai
Class : Class 6
Loud speakers use electromagnets as they dont need magnetic force when not in use so ans is B

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Gauri Singh from St Johns School Marhauli, Varanasi
Subject :NSO    Class : Class 6

Ans 1:

rocker harshil from TImpany senior secondary school, Visakhapatnam
Class : Class 6
as only the option (D) will be magnetic and the SOFT IRON will act as a keepers

Ans 2:

arjun from the bishops school camp , pune
Class : Class 8

Ans 3:

Syed Mukhtar Ahmed from Mayoor Private School, Abu Dhabi
Class : Class 6

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Agastya Tripathi from dps gurgaon, Gurgaon
Subject :NSO    Class : Class 5

Ans 1:

Ujjwal Upadhyay from Navy Children school, Vasco
Class : Class 6
Well... I think the answer is B

Ans 2:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The answer is B

Ans 3:

AREEN from BOLTON, HYDERABAD
Class : Class 6
Ans should be A because tuemeric powder is solid and solids are incompressible. Liquids are also incompressible but the some of the liquid has gone above the end of the piston, which is inside the syringe. Gases are compressible, so the piston easily moves.

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student from school, city
Subject :NSO    Class : Class 6

Ans 1:

NISHTHA GUPTA from DPS R K Puram, newdelhi
Class : Class 10
solution?

Ans 2:

Saikrishna Nandakumar from Shishya BEML Public School, BANGALORE
Class : Class 6
c

Ans 3:

BHAVYA from iswk, Oman
Class : Class 6
can I have an explanation please....... plz...plz...plz...

Ans 4:

Shreyas from Phoenix greens, Hyderabad
Class : Class 9

Ans 5:

Anushka Srivastava from Cjm, Dehradun
Class : Class 7
its C acording to me

Ans 6:

Lakshmi from FPS, Bangalore
Class : Class 10
c is the answer

Ans 7:

Neil Mathew from National Public school, bengaluru
Class : Class 8
How is it C!?

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Shreenath Rajesh Nair from J H A S V Surat, Surat
Subject :NSO    Class : Class 8

Ans 1:

Triguna from Kendriya Vidyalaya No.1 Salt Lake, Kolkata
Class : Class 8
Me too... I also think that the correct option will be C

Ans 2:

Madhav from Aggarsain Public School, Kurukshetra
Class : Class 9
correct answer is C

Ans 3:

Prisha Hemchandra Lokhande from NPS Whitefield, Bangalore, Bangalore
Class : Class 8
The answer is C because the ray would refract and be parallel to incident ray. also the emergent ray cant appear behind the incident ray

Ans 4:

Pujan Rajyaguru from Allen, Ahemdabad
Class : Class 8
yes i think that opt C is correct

Ans 5:

Shreyam Tripathy from Ann Mary School, Dehradun
Class : Class 10
answer is C

Ans 6:

Kaavyy boolani from Cambridge Court World School, Jaipur
Class : Class 6
It is Option C only, as when light travels from denser to rarer medium, it bends away from normal

Ans 7:

Avyukth Radhakrishnan from TSRS, Gurgaon
Class : Class 10
It's A.When light travels from a denser to rarer medium,it bends TOWARDS the normal(Check normal in solution).Hence,answer is A.

Ans 8:

arav agrawal from kaanger valley academy, Raipur
Class : Class 9

Ans 9:

Pranavi Nayakwadi from JSS Shri Manjunatheshwara Central School, Dharwad
Class : Class 8
I too think the correct ans is C rather than A

Ans 10:

Abhinav from nesss, vadodara
Class : Class 10
I too think correct option is C

Ans 11:

Ami Buch from DPS Gandhinagar, Gandhinagar
Class : Class 6
After checking the Snell's law, I found the answer to be C...But it says the correct answer is A

Ans 12:

Ved Pandhare from Lilavatibai Podar High School, Mumbai
Class : Class 8
correct answer is C as the ray would refract if its passing from a rarer to denser medium.

Ans 13:

arav agrawal from kaanger valley academy, Raipur
Class : Class 9

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Shuvangi Das from Vivekananda mission school, haldia
Subject :NSO    Class : Class 4

Ans 1:

Aarav sugla from Niraj International School , Secunderabad
Class : Class 5

Ans 2:

AAYANSH from SMT.L.B.JOSHI ENGLISH HIGH SCHOOL, Thane
Class : Class 4
Aayansh from mundamarai

Ans 3:

Adarsh Kishor from Manav Rachna International Sector46, Gurgaon
Class : Class 4
I GOT 40/40 IN THIS QES. PAPER

Ans 4:

Avigyan Gaurab from DPS Numaligarh, Golaghat
Class : Class 5
tg4tg

Ans 5:

Sanjeev Kumar Singh from S N B P INTERNATIONAL SCHOOL PUNE, RAHATANI
Class : Class 4
c

Ans 6:

Ananya Singh from Chrysalis High School, Bengaluru
Class : Class 4

Ans 7:

Sanjeev Kumar Singh from S N B P INTERNATIONAL SCHOOL PUNE, RAHATANI
Class : Class 4

Ans 8:

AVANTIKA V from Amrita Vidyalayam Puducherry , Puducherry
Class : Class 4
Ans: C

Ans 9:

Sushree snehasikta behera from Mother's public school , Bhubaneswar
Class : Class 2
Sushree Snehasikta Bhera from Mother's Public school, Odishaclass 4Answer is c as cockroach has three stages in its life cycle and also the young one of the cockroach resembles the adult. The housefly also has three stages in its life cycle and also does not resemble its adult.

Ans 10:

Gunnit Kant from DPS, Nerul, Navi Mumbai
Class : Class 5
C

Ans 11:

AAGNEY GOYAL from VENKATESHWAR INTERNATIONAL SCHOOL, Delhi
Class : Class 4

Ans 12:

Aadya Kawale from Podar International ICSE , Dombivli East
Class : Class 4
Shuchi: P is an organism which has three stages in its life cycle. The young one is very similar to its parent.Ritu: Q is an organism which has four stages in its life cycle. The young one is very different from its parent.Now, let’s see which of the following options gives the right identities of Organisms P and Q:

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Debarpan Das from Delhi Public School , Durgapur
Subject :NSO    Class : Class 4

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SHAUNAK from St Xaviers School, HAZARIBAG
Subject :NSO    Class : Class 3

Ans 1:

Kashika Goel from DPS Noida, Noida
Class : Class 7

Ans 2:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD
Class : Class 3
B

Ans 3:

Arnav Basu from faps, Bengaluru
Class : Class 6
b

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SHAUNAK from St Xaviers School, HAZARIBAG
Subject :NSO    Class : Class 3

Ans 1:

Iraj Singh from DPS Megacity, Kolkata
Class : Class 9
The correct answer is B.

Ans 2:

SHAUNAK from St Xaviers School, HAZARIBAG
Class : Class 3
B is the right answer.

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