National Science Olympiad Forum By SOF Olympiad Trainer - Page 214

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6

Ans 2:

Class : Class 6

Ans 3:

Class : Class 6
shall be BBBBBBBBBBBBBBBBBBBBBBBBBBB

Ans 4:

Class : Class 6
it should be ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 5:

Class : Class 8

Ans 6:

Class : Class 6
1. The Rule of Magnetic Field LinesEvery magnet creates an invisible area of magnetic influence around itself called a magnetic field. By universal convention, we map this field using continuous loops called field lines:Outside the magnet: Field lines always emerge from the North pole (N) and travel through space to enter the South pole (S).Continuous Loops: They do not stop or cross; they form smooth, curved paths connecting the poles.2. What Happens at the Middle (Equator)?Because the field lines must curve all the way from the right side (North) back to the left side (South), they form large arches above and below the magnet.The Push: The North pole pushes the compass's north needle away (diagonally up and to the left).The Pull: The South pole attracts the compass's north needle toward it (diagonally down and to the left).The Result: The upward push and downward pull perfectly cancel each other out vertically. This leaves only a combined horizontal force pointing straight to the left.3. How a Compass RespondsA compass needle is simply a tiny, lightweight bar magnet that is free to rotate.The North-seeking tip (usually colored red or marked with an arrow) always experiences a force that aligns it parallel to the local magnetic field lines.Since the total magnetic field line at that specific point points from right-to-left, the arrow of the compass must point left.

Ans 7:

Class : Class 6
The needle should point towards South pole because the Earth's North Pole is actually the South pole of a bar magnet. Compass needle always points to the geographical North pole.

Ans 8:

Class : Class 6
North and South attract each other. Since the compass is placed in the middle of the bar magnet and not ON it and the North pole of the compass needle can face the South pole of the magnet diagonally only, should not the correct answer be C? Also, the north pole of the Earth's magnetic field should not come into consideration here, I think.

Ans 9:

Class : Class 7

Ans 10:

Class : Class 8
But a compass always points to the magnetic north pole, not geographic north pole right?

Ans 11:

Class : Class 6
Shouldn't the correct answer be (A), since a compass needle ALWAYS points in the North Direction? Pls Help.

Ans 12:

Class : Class 7
The earth's north pole acts like a south pole to the magnet as it attracts the north pole of a magnet (The earth's north pole attracts the north pole of a magnet). This means that the needle of a compass is always the north pole. So, the needle will point to the south pole of the other magnet. In simple words, the North pole of the earth is actually the south pole for a magnet.

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
explain

Ans 2:

Class :
Please give more questions like this

Ans 3:

Class :
ans is 9 please explain how ot is 11we even asked google lens it also says ans is 9

Ans 4:

Class : Class 6
Kindly explain.......

Ans 5:

Class : Class 6

Ans 6:

Class : Class 7

Ans 7:

Class : Class 8
Yes austin

Ans 8:

Class : Class 7
it is 9m as 12m - 5m = 7m , 7m 2m = 9m , kindly the correct answer is 9m .

Ans 9:

Class : Class 9

Ans 10:

Class : Class 6
The answer is 9m only, as there are 2 methods: 1. 12 2=14m. 14-5=9m. 2. 12-5=7m. 7 2=9m.

Ans 11:

Class : Class 7

Ans 12:

Class : Class 4
12-5=77*2=14that should be the answer

Ans 13:

Class : Class 9
The answer should be 9m as 12 2=14-5=9

Ans 14:

Class :
the ans is 9we even asked Google lens,even google said ans is 9

Ans 15:

Class : Class 6

Ans 16:

Class : Class 6

Ans 17:

Class : Class 7
@ Rachita Gupta-I don't know I'm confused now.

Ans 18:

Class : Class 6
The Answer Should be 9 = 12m-5m= 7m 2m = 9m

Ans 19:

Class : Class 6

Ans 20:

Class : Class 6
answer is 9

Ans 21:

Class : Class 8
Does anyone understand this?

Ans 22:

Class : Class 7
Here it is asking how far away boy Y would APPEAR to be in the mirror to boy X, as in, from boy X's perspective. Y is 12 m away from the MIRROR. He moves 5 m closer12-5=7This is where confusion may set in. A lot of people have added X's distance from the mirror(2 m)7 2=9Here, we are getting the total as 9 m.. However, it is also necessary to add 2 m for the reflected ray to travel to X so that he can see the image.9 2=11Hence, the answer is 11 m.

Ans 23:

Class : Class 7
It's nine.

Ans 24:

Class : Class 8
Correct answer is 9m. Already explained in olympaid prep-guide book.

Ans 25:

Class : Class 8
The answer should be 9

Ans 26:

Class : Class 8
Can anyone please explain?

Ans 27:

Class : Class 7
@Rachita Gupta- They are asking how far away boy-y would appear to be from BOY-X not the mirror so I'm guessing it should be 9m.

Ans 28:

Class : Class 6
9 should be the answer

Ans 29:

Class : Class 7
How 11cm

Ans 30:

Class : Class 6
please explain

Ans 31:

Class : Class 7

Ans 32:

Class : Class 6
Should be ( as 12 2

Ans 33:

Class : Class 7
the distance in the mirror of boy y would be 9m but distance from mirror to boy x would be 9 plus 2= 11

Ans 34:

Class : Class 7
Tis is not in synopsis

Ans 35:

Class : Class 7
answer should be 9

Ans 36:

Class : Class 9
Please explain

Ans 37:

Class : Class 4
12-5 =7 7 2=9answer is 9

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Subject :NSO    Class : Class 2

Ans 1:

Class : Class 7
It is so easy

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Subject :NSO    Class : Class 10

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 2

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