Subject :NSO Class : Class 5
Subject :NSO Class : Class 4
Post Your Answer
Subject :NSO Class : Class 4
Post Your Answer
Subject :NSO Class : Class 4
Post Your Answer
Subject :NSO Class : Class 4
Post Your Answer
Subject :NSO Class : Class 6
Ans 4:
Class : Class 7
The answer D is correct. Magnetic field moves from North to South, and if you follow the direction of the compasses, you will see that this theory is true.
Post Your Answer
Subject :NSO Class : Class 6
Ans 3:
Class : Class 3
No guys. Human eye can't focus simultaneously on two points. To avoid parallax error , eye should be on the point of measurement to be taken.Hence given answer is correct in my view. You may comment.
Ans 5:
Ans 6:
Class : Class 6
this is basic 6th grade physics, you cannot always be measuring 0cm, so as to avoid parallax error your eye must be placed right above the scale, if you do not beleive me ask your science/physics teacher. Hence it is A.
Ans 11:
Class : Class 8
I think it should be C because otherwise the zero end can shift slightly (in our viewpoint) and measurement will be wrong. So both statements a and b are correct and the answer is C.
Ans 14:
Class : Class 7
No as it causes a parallax error.
It should be option A.
If you don't believe me then try it yourself with a scale and measuring a line segment from different eye positions.
You will see that, the measurement varies slightly every time. That's why option A is correct.
Post Your Answer
Subject :NSO Class : Class 6
Ans 3:
Class : Class 6
Sachin is being tested for his eyesight by an optician.Now, let’s read the given information carefully, and find out the position of Sachin.Sachin sits 3 m in front of a plane mirror, and looks at the image of the chart of letters, which seems to be 7 m in front of him.This means the distance between the mirror and the image of the chart is (7 m – 3 m = 4 m). If the image of the chart is 4 m behind the mirror, then the actual chart is placed 4 m in front of mirror.Now the chart is placed 4 m in front of the mirror, and Sachin is sitting 3 m in front of the mirror. That means the chart is placed (4 m – 3 m = 1 m) behind Sachin. Hence, the right answer is Option A.
Ans 8:
Class : Class 6
Sachin is being tested for his eyesight by an optician.Now, let’s read the given information carefully, and find out the position of Sachin.Sachin sits 3 m in front of a plane mirror, and looks at the image of the chart of letters, which seems to be 7 m in front of him.This means the distance between the mirror and the image of the chart is (7 m – 3 m = 4 m). If the image of the chart is 4 m behind the mirror, then the actual chart is placed 4 m in front of mirror.Now the chart is placed 4 m in front of the mirror, and Sachin is sitting 3 m in front of the mirror. That means the chart is placed (4 m – 3 m = 1 m) behind Sachin. Hence, the right answer is Option A.
Ans 14:
Class : Class 7
A as image is as far behind the mirror as Object is in front of it.
In this case Sachin is 3 m in front of the mirror and the object seems to be seven meters ahead.
As Sachin is 3 m in front of the mirror that means object is (7-3) = 4 m behind the mirror.
As image is as far behind the mirror as Object is in front of it, It means chart is 4 meters in front of the mirror.
( 4 - 3 ) = 1 m behind Sachin as Sachin is also in front of the mirror.
Hope that answers your question !
Post Your Answer
Subject :NSO Class : Class 5
Post Your Answer
Subject :NSO Class : Class 3