National Science Olympiad Forum By SOF Olympiad Trainer - Page 495

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
This is wrong. The answer should be C, due to induction. The positive charges move to the bottom as they repel, while the negative particles should move to the top, as they are attracted to the positive particles in the bar.

Ans 2:

Class : Class 7

Ans 3:

Class : Class 4
how priyanka

Ans 4:

Class : Class 7

Ans 5:

Class : Class 8
how to do it

Ans 6:

Class : Class 1

Ans 7:

Class : Class 7
I don't understand tbh

Ans 8:

Class : Class 7
why not option c?

Ans 9:

Class : Class 1
@Bhagyesh You need to use your brain and do it with your hands. Simple. @Raavi no need of that big thingy

Ans 10:

Class : Class 8
option a

Ans 11:

Class : Class 1
@Bhagyesh You need to use your

Ans 12:

Class : Class 8

Ans 13:

Class : Class 8
option a

Ans 14:

Class : Class 7

Ans 15:

Class : Class 8
@bhagyesh .As metal rod or electroscope is positively charged all the currents flown to the object will be positive and the leaves will repel each other

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 10
Loudspeakers use electromagnets, so the answer is option B

Ans 2:

Class : Class 5
Loud speakers use permanent magnets

Ans 3:

Class : Class 9
Loudspeakers use electromagnets so it should be answer b

Ans 4:

Class : Class 9
The answer is B as loudspeakers use electromagnets and the magnetic field isn't there always .

Ans 5:

Class : Class 6
Loud speakers use electromagnets as they dont need magnetic force when not in use so ans is B

Ans 6:

Class : Class 8
But all of them use permanent magnets...so D is correct

Ans 7:

Class : Class 10
they use both so the answer is d

Ans 8:

Class : Class 7
answer should be b

Ans 9:

Class : Class 9

Ans 10:

Class : Class 10
loud speakers have both electromagnets and permanent magnets

Ans 11:

Class : Class 7
Don't loudspeakers use electromagnets?

Ans 12:

Class : Class 9
Loudspeakers use electromagnets.So,the answer should be (B)

Ans 13:

Class : Class 6
answer is B so obvious

Ans 14:

Class : Class 7
Loudspeakers use electromagnets.

Ans 15:

Class : Class 10
answer will be b as loudspeakers use electromagents

Ans 16:

Class : Class 10

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6

Ans 2:

Class : Class 8

Ans 3:

Class : Class 6
as only the option (D) will be magnetic and the SOFT IRON will act as a keepers

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
Well... I think the answer is B

Ans 2:

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.

Ans 3:

Class : Class 9
The answer is B

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 10
c is the answer

Ans 2:

Class : Class 6
can I have an explanation please....... plz...plz...plz...

Ans 3:

Class : Class 9

Ans 4:

Class : Class 6
c

Ans 5:

Class : Class 10
solution?

Ans 6:

Class : Class 7
its C acording to me

Ans 7:

Class : Class 8
How is it C!?

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Subject :NSO    Class : Class 8

Ans 1:

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 2:

Class : Class 8
correct answer is C as the ray would refract if its passing from a rarer to denser medium.

Ans 3:

Class : Class 10
I too think correct option is C

Ans 4:

Class : Class 8
Me too... I also think that the correct option will be C

Ans 5:

Class : Class 9

Ans 6:

Class : Class 9

Ans 7:

Class : Class 8
yes i think that opt C is correct

Ans 8:

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 9:

Class : Class 6
It is Option C only, as when light travels from denser to rarer medium, it bends away from normal

Ans 10:

Class : Class 9
correct answer is C

Ans 11:

Class : Class 10
answer is C

Ans 12:

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 13:

Class : Class 8
I too think the correct ans is C rather than A

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
C

Ans 2:

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 3:

Class : Class 4

Ans 4:

Class : Class 4
Ans: C

Ans 5:

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:

Ans 6:

Class : Class 4

Ans 7:

Class : Class 4

Ans 8:

Class : Class 4
I GOT 40/40 IN THIS QES. PAPER

Ans 9:

Class : Class 4
Aayansh from mundamarai

Ans 10:

Class : Class 5

Ans 11:

Class : Class 5
tg4tg

Ans 12:

Class : Class 4
c

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
B

Ans 2:

Class : Class 7

Ans 3:

Class : Class 6
b

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