National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4
D

Ans 2:

Class : Class 3

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
A

Ans 2:

Class : Class 3
B

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Subject :NSO    Class : Class 3

Ans 1:

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 2:

Class : Class 3

Ans 3:

Class : Class 3
Answer is D because both lungs n kidney are in Exetery system

Ans 4:

Class : Class 3
D

Ans 5:

Class : Class 4

Ans 6:

Class : Class 3
i think heart is correct answer. please elaborate, how come kidney is right answer a

Ans 7:

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 8:

Class : Class 4
Heart

Ans 9:

Class : Class 3
I thinks it should be heart. As lungs are connected with the heart not kidney.

Ans 10:

Class : Class 3
D because spinal cord helps brain to control the body.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
use your brain bro

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Subject :NSO    Class : Class 8

Refer to the given passage and answer the following questions.
An experiment is conducted by a student to check the conductivity of potato and the set-up is shown here.

What happens to the compass needle when the switch is closed?

A The compass needle will point towards the right.
B The compass needle will point towards the left.
C The compass needle will not deflect.
D The compass needle will point downwards.


Please answer this

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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 7
@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 2:

Class : Class 8
how to do it

Ans 3:

Class : Class 8
option a

Ans 4:

Class : Class 4
how priyanka

Ans 5:

Class : Class 8
option a

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
answer will be b as loudspeakers use electromagents

Ans 2:

Class : Class 6

Ans 3:

Class : Class 6
Loudspeakers use electromagnets, so the answer is option B

Ans 4:

Class : Class 6
The answer is B as loudspeakers use electromagnets and the magnetic field isn't there always .

Ans 5:

Class : Class 7
answer should be b

Ans 6:

Class : Class 6
answer is B so obvious

Ans 7:

Class : Class 6
Loudspeakers use electromagnets so it should be answer b

Ans 8:

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

Ans 9:

Class : Class 7
Don't loudspeakers use electromagnets?

Ans 10:

Class : Class 7
Loudspeakers use electromagnets.

Ans 11:

Class : Class 6
Loudspeakers use electromagnets.So,the answer should be (B)

Ans 12:

Class : Class 6
But all of them use permanent magnets...so D is correct

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

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

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