National Science Olympiad Forum By SOF Olympiad Trainer - Page 502

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 8

Ans 2:

Class : Class 2

Ans 3:

Class : Class 9
D

Ans 4:

Class : Class 3

Ans 5:

Class : Class 6

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3

Ans 2:

Class : Class 6
Heart

Ans 3:

Class : Class 3
i think brain n spinal cord are parts of nervous system whereas kidneys n lungs are part of excretory system,through lungs we inhale o2 n exhale co2,kidneys excrete urines

Ans 4:

Class : Class 8
D because spinal cord helps brain to control the body.

Ans 5:

Class : Class 5
the spi

Ans 6:

Class : Class 3

Ans 7:

Class : Class 3
Heart is the correct answer

Ans 8:

Class : Class 3
I think both kidneys and hearth are correct. beacause lungs are in respiratory,curculatory and excretory system as they help us to brathe ,make pure blood and also the blood goes from hearth then lungs and then all parts. Plese tell how hearth is wrone.

Ans 9:

Class : Class 6
lungs and spinal cords are part of nervous system so lungs and kidney are part of excretory system(lungs dispose co2 from body)

Ans 10:

Class : Class 3
D

Ans 11:

Class : Class 6
I thinks it should be heart. As lungs are connected with the heart not kidney.

Ans 12:

Class : Class 5
Answer is D because both lungs n kidney are in Exetery system

Ans 13:

Class : Class 4
It will be kidney because lungs give out carbon dioxide as waste.Heart is the wrong answer........

Ans 14:

Class : Class 5
I think it should be heart not kidney

Ans 15:

Class : Class 3
I think option a is also correct with option d as lungs are in curcularury system system too as the blood first goes to the lungs after the heath and then the body. Lungs also filter air and help us breathe so they are in excretory and resperatory system too. Plese tell how option a hearth is wrong .

Ans 16:

Class : Class 5
spinal cord connects every organ to brain an

Ans 17:

Class : Class 8
i think heart is correct answer. please elaborate, how come kidney is right answer a

Ans 18:

Class : Class 5

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
You can earn badges by studying hard in sof , like doing tests, previous year papers, mock tests, etc.

Ans 2:

Class : Class 8
use your brain bro

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
Please explain your answer. I am really confused.@UTKARSH SAWARN

Ans 2:

Class : Class 8
IN MY OPINION OPTION C IS THE CORRECT ANSWER

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8
how to do it

Ans 3:

Class : Class 7

Ans 4:

Class : Class 7
I don't understand tbh

Ans 5:

Class : Class 1

Ans 6:

Class : Class 1
@Bhagyesh You need to use your

Ans 7:

Class : Class 7

Ans 8:

Class : Class 8
option a

Ans 9:

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

Ans 10:

Class : Class 4
how priyanka

Ans 11:

Class : Class 8
option a

Ans 12:

Class : Class 7

Ans 13:

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 14:

Class : Class 7
why not option c?

Ans 15:

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

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 6

Ans 1:

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

Ans 2:

Class : Class 7
Don't loudspeakers use electromagnets?

Ans 3:

Class : Class 5
Loud speakers use permanent magnets

Ans 4:

Class : Class 6
answer is B so obvious

Ans 5:

Class : Class 7
Loudspeakers use electromagnets.

Ans 6:

Class : Class 9

Ans 7:

Class : Class 7
answer should be b

Ans 8:

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

Ans 9:

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

Ans 10:

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

Ans 11:

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

Ans 12:

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

Ans 13:

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

Ans 14:

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

Ans 15:

Class : Class 10

Ans 16:

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

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8

Ans 2:

Class : Class 6

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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