HARD
10th CBSE
IMPORTANT
Earn 100

Four students A, B, C and D performed an experiment to determine the focal length of a concave mirror by using a lighted candle kept at a considerable distance as the object. They represented the position of image by drawing the following diagrams:

Which diagram describes the correct position of the image of the candle?

32.35% studentsanswered this correctly

Important Questions on Multiple Choice Questions

MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 7 - Multiple Choice Questions>Multiple Choice Questions>Q 65

The parallel rays from the top of a distant tree are incident on a concave mirror forming its image on a screen.

The diagram which shows the image of the tree on the screen correctly is:

HARD
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 7 - Multiple Choice Questions>Multiple Choice Questions>Q 66
In order to determine the focal length of a concave mirror, a student obtained a sharp image of the grill of a window in the laboratory wall on a screen. His teacher suggested that to get better result for focal length, he should focus a distant tree instead of the window grill. In which direction should the mirror be moved for this purpose so as to get a sharp image of the tree on the screen?
HARD
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 7 - Multiple Choice Questions>Multiple Choice Questions>Q 67
In order to determine the focal length of a concave mirror, a student obtained a sharp image of a distant tree on a screen. In order to obtain a sharp image of a window grill of the laboratory on the same screen, in which direction should the screen be moved?
HARD
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 7 - Multiple Choice Questions>Multiple Choice Questions>Q 68

A student performs an experiment on finding the focal length of a convex lens by keeping a lighted candle on one end of the laboratory table, a screen on its other end and the lens between them as shown in the figure. The positions of the three are adjusted to get a sharp image of the candle flame on the screen. If now the candle flame were to be replaced by a distant lamp on a far away electric pole, the student would be able to get a sharp image of this distant lamp on the screen by moving:

Question Image

HARD
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 7 - Multiple Choice Questions>Multiple Choice Questions>Q 69
A student obtained a sharp image of the grill of a window in the laboratory on a screen, using a convex lens. For getting better results, her teacher suggested focusing of a distant tree instead of the grill. In which direction should the lens be moved for this purpose to get a sharp image on the screen?
HARD
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 7 - Multiple Choice Questions>Multiple Choice Questions>Q 70
A sharp image of a distant object is obtained on a screen by using a convex lens. In order to determine the focal length of the lens, you need to measure the distance between the:
HARD
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 7 - Multiple Choice Questions>Multiple Choice Questions>Q 71
While performing the experiment to determine the focal length of a convex lens by using the sun as the distant object, a student could not find a screen with stand. In absence of a good screen, which of the following method is the most appropriate and safe to be used by the student?
HARD
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 7 - Multiple Choice Questions>Multiple Choice Questions>Q 72
While performing the experiment on determining the focal length of a convex lens, a student obtains a sharp inverted image of the laboratory window grill on the screen and measures the distance between the screen and the lens. She then repeats the experiment and takes a distant tree as the object in the second case. In order to get a sharp image of the tree on the screen, she will now have to move the screen: