National Science Olympiad Forum By SOF Olympiad Trainer - Page 647

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
If you clearly notice, the arrow is first coming in contact with Part Q, and the arrow is above in Part P. First, the magnet comes in contact with part Q, so when the iron rod is magnetised, Part Q will be North pole.

Ans 2:

Class : Class 8
The answer is B

Ans 3:

Class : Class 9
Q or R?????? PLEASE EXPLAIN MASTER ANSWER!

Ans 4:

Class : Class 9
Yes it should be A ......because it is not possible that some of the iron bar is magnet and some is iron ....in the given figure starting of the stroke is point is Q but before that is point P which is starting of the rod so the CORRECT answer is A ..

Ans 5:

Class : Class 7
The poles are end point of the magnet ,so the north pole should be P.

Ans 6:

Class : Class 9
At first, I also thought that it will be A but if you see the figure closely, you can see that the magnet first comes in contact with point Q, it is rubbed till R and is then lifted at R point. So, Point Q would be the north pole and the point R would be the south pole

Ans 7:

Class : Class 7
A

Ans 8:

Class : Class 9
It should be a

Ans 9:

Class : Class 6
I didnt understand how it is R, can someone explain? Because according to me, the first point of contact is Q, but maybe that's not how it works....

Ans 10:

Class : Class 6
As north seeking pole is geographic south pole so R is north seeking pole. so , basically the south pole is the north seeking pole and as the north pole is facing downwards and starting with Q so south pole will be R . Hence, R is the north seeking pole and option C is the correct option.

Ans 11:

Class : Class 7
In the above process of magnetisation, the magnet makes its first contact with the iron rod on place R, so R would be the North pole of the magnetised iron bar.

Ans 12:

Class : Class 8
it has started magnetising from Q SO THATS WHY IT IS TELLING THAT Q WILL BE THE NORTH SEEKING POLE.

Ans 13:

Class : Class 7
The correct answer is (B) because Q is the first point of contact.

Ans 14:

Class : Class 8
B IS A WRONG ANSWER.

Ans 15:

Class : Class 7
Sorry R would be the south pole because of the reason:Q becomes the North pole, and R, where the magnet is lifted becomes the south pole.

Ans 16:

Class : Class 6
N POLE ALWAYS GIVE THAT'S WHY A

Ans 17:

Class : Class 8
I agree with jigishal

Ans 18:

Class : Class 7
A

Ans 19:

Class : Class 6
IT WILL BE P!

Ans 20:

Class : Class 9
see the solution the magnet gets in contact with q so it is the correct ans

Ans 21:

Class : Class 9
Will P be the North Pole or Q? So confusing!!🤔🤔

Ans 22:

Class : Class 7
it will be P!!!!!!!!!!!!!

Ans 23:

Class : Class 7
The answer is P as you can clearly see the iron rod should allow the magnetism to flow like what happens when you chain a nail, even though you are affecting only the top part the whole screw is affected hence proving the answer is wrong

Ans 24:

Class : Class 6
The correct answer is (B),Q because the magnetic contact starts on Q and not on P.

Ans 25:

Class : Class 10
The magnet first makes contact with Q, so, it is the North Pole of the magnet

Ans 26:

Class : Class 7

Ans 27:

Class : Class 6
AS NORTH POLE INTRODUCED AT Q PART OF THE IRON ROD SO Q WILL BE NORTH POLE.

Ans 28:

Class : Class 6
A IS TH CORRECT ANSWER. In the figure they started stoking the iron piece from point P which is the starting of the iron rod. so the correct answer is A.....

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
It was not there. ;)

Ans 2:

Class : Class 5
who knows they will give or not give

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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 2:

Class : Class 3
oh I thinked it is (A)

Ans 3:

Class : Class 3
The answer is c

Ans 4:

Class : Class 7
C

Ans 5:

Class : Class 5

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 9
I m

Ans 2:

Class : Class 7
ya i bet it is c

Ans 3:

Class : Class 9
If the filament of bulb Q is fused then the circuit is not being completed because the electrons won't be able to reach the positive terminal as they would be stopped by the broken filament and electricity won't be able to pass through the filament to the negative terminal and due to the two cases that a circuit has to be completed for electricity to move and second one given it is proven that option 'B' is the correct option instead of 'A' 'C' or ' D'

Ans 4:

Class : Class 10

Ans 5:

Class : Class 9
answer should be c as the wire is connecting to p and r ALSO IF THE FILAMENT IS BROKEN ONLY Q CAN NOT LIGHT UP.

Ans 6:

Class : Class 9

Ans 7:

Class : Class 10
UHHH How answer D???

Ans 8:

Class : Class 9
I meant option 'D' not option B sorry for the mistake in my arguement

Ans 9:

Class : Class 9
dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd

Ans 10:

Class : Class 4
ccc

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
i also want to know the same question

Ans 2:

Class : Class 8
I feel it is not decreasing but increasing so answer will be a

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
answer is D

Ans 2:

Class : Class 5

Ans 3:

Class : Class 6
answer is d because due to the incoming air because of cold water if the water was hot then the ink drops would move up

Ans 4:

Class : Class 9
D

Ans 5: (Master Answer)

Class : Class 1

Ans 6:

Class : Class 8
Due to gravity, both will move downwards, so the correct answer is d

Ans 7:

Class : Class 6
Due to the cooling effect of ice water, the air in the U-tube contracts, due to which the red ink X and Y move downwards.

Ans 8:

Class : Class 8
There is ice water so it doesn't mean that gravity is gone man

Ans 9:

Class : Class 6

Ans 10:

Class : Class 5
i had this correct but sof result is showing correct answer is d and i have writen d. BAD MALFUNCTION AND NEGATIVE MARKING IS THERE

Ans 11:

Class : Class 8
answer is D

Ans 12:

Class : Class 8
answer is D

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 7
D

Ans 2:

Class : Class 4

Ans 3:

Class : Class 4
answer is D

Ans 4:

Class : Class 3
ans should be a coz liver only secretes bile which digests fats not pancreas

Ans 5:

Class : Class 3
ans is d!!

Ans 6:

Class : Class 4

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
Answer is B because if you move towards a mirror ,your image will get bigger.

Ans 2:

Class : Class 7
B

Ans 3:

Class : Class 1
ans should be B..

Ans 4:

Class : Class 7
C is correct as the girl is not seeing the image. If you play or know Minecraft, you can be like in the spectator mode and if you have a mirror mod, then you will see the mob with the same size of the image whether it is near or not.

Ans 5:

Class : Class 7
thank you

Ans 6:

Class : Class 10
answer is B

Ans 7:

Class : Class 9
it should be B....

Ans 8:

Class : Class 6
ANSWER IS B

Ans 9:

Class : Class 1
I THINK THERE IS SOME ISSUE FROM THE WEBSITE. ANS SHOULD BE B

Ans 10:

Class : Class 7
Parth Wave your hand towards the mirror you silly!

Ans 11:

Class : Class 9
Bbbbbbbb

Ans 12:

Class : Class 1
It should be B!!

Ans 13:

Class : Class 9
The correct option is b as if we will move towards mirror our image formed will increase in size paulette don't know the answer

Ans 14:

Class : Class 7
It should be b

Ans 15:

Class : Class 7

Ans 16:

Class : Class 9
request solution

Ans 17:

Class : Class 4
its b not c

Ans 18:

Class : Class 6
b,its b.

Ans 19:

Class : Class 9

Ans 20:

Class : Class 1
the correct answer is b

Ans 21:

Class : Class 6
request explanation

Ans 22:

Class : Class 10
B is the correct option

Ans 23:

Class : Class 9
it should be B not C

Ans 24:

Class : Class 6

Ans 25:

Class : Class 6
ANS IS B

Ans 26:

Class : Class 6
b

Ans 27:

Class : Class 9

Ans 28:

Class : Class 7
answer should be (B)

Ans 29:

Class : Class 6
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb!!!!!!!!!!!!!!!!!!

Ans 30:

Class : Class 7
It is just a printing mistake. It happens with many questions and the correct answer is option B.

Ans 31:

Class : Class 7
B

Ans 32:

Class : Class 9
it should be B

Ans 33:

Class : Class 8
Hello There....I have answered test.....Answer is CSolution:The image formed in the plane mirror is always of the same size as that of the object.

Ans 34:

Class : Class 8
it should be b

Ans 35:

Class : Class 6
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb

Ans 36:

Class : Class 7

Ans 37:

Class : Class 9
Answer should be b

Ans 38:

Class : Class 9
correct option will be (B)

Ans 39:

Class : Class 8
It should be c. try the experiment.

Ans 40:

Class : Class 3
In the case of a plane mirror, the size of the image is equal to the size of the object, irrespective of the distance of the object from the mirror

Ans 41:

Class : Class 4
b b b b b bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb

Ans 42:

Class : Class 7
Ans should be b

Ans 43:

Class : Class 3
it is bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbsof please change it quickly

Ans 44:

Class : Class 7
The correct answer is B

Ans 45:

Class : Class 9
B

Ans 46:

Class : Class 8
it should be opt b

Ans 47:

Class : Class 6

Ans 48:

Class : Class 7

Ans 49:

Class : Class 6
Yes b is correct

Ans 50:

Class : Class 7
Answer should be B because if you move towards a mirror ,your image will get bigger.

Ans 51:

Class : Class 6
come on who made this tests answer key go look at your mirror its b

Ans 52:

Class : Class 6
The answer should be option B.

Ans 53:

Class : Class 6
answer is b,because the size of the image increases when we move towards it

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8

Ans 2:

Class : Class 7
ans : a, in case of option c & d no change of soil fertility in case of option b cyclone do not dissolve soil or rocks in option a saline water can change the soil fertility

Ans 3:

Class : Class 7
ans : a, in case of option c & d no change of soil fertility in case of option b cyclone do not dissolve soil or rocks in option a saline water can change the soil fertility

Ans 4:

Class : Class 7
a

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