Previous Year Paper year:2019 : ICSE-X-Physics

Home Learn Fast select Course

Change Unit Change Subject Last Menu

ICSE-X-Physics

Previous Year Paper year:2019

with Solutions - page 5

Note: Please signup/signin free to get personalized experience.

Note: Please signup/signin free to get personalized experience.

10 minutes can boost your percentage by 10%

No item to list.

Note: Please signup/signin free to get personalized experience.

#5-c-iii
If the tension acting on the string is T, then what is the relationship between T and effort E?
Ans : T = E.

#5-c-iv
If the free end of the string moves through a distance x, find the distance by which the

load is raised.

Ans : The distance travelled by load is half the distance moved by effort = ``\frac { x }{ 2 }`` .

#6

#6-a
How does the angle of deviation formed by a prism change with the increase in the angle of

incidence? Draw a graph showing the variation in the angle of deviation with the angle of incidence at a prism surface.

[3]

Ans : As the. angle of incidence increases the angle of deviation decreases becomes minimum and then increases.

The graph is as shown :

#6-b
A virtual, diminished image is formed when an object is placed between the optical centre and the principal focus of a lens.

#6-b-i
Name the type of lens which forms the above image.
Ans : Concave lens.

#6-b-ii
Draw a ray diagram to show the formation of the image with the above stated characteristics.

[3]

Ans : The ray diagram is as shown :

#6-c
An object is placed at a distance 24 cm in front of a convex lens of focal length 8 cm.
Ans : Given u = - 24 cm, f= + 8 cm, v = ?

#6-c-i
What is the nature of the image so formed ?
Ans : Real, inverted and diminished.

#6-c-ii
Calculate the distance of the image from the lens.
Ans : Using the lens formula

#6-c-iii
Calculate the magnification of the image.

[4]

Ans : Using the expression m =``\frac { v }{ u }`` = ``\frac { 12 }{ -24 }`` = ``\frac { 1 }{ 2 }`` .

#7

#7-a
It is observed that during march-past we hear a base drum distinctly from a distance compared to the side drums.

#7-a-i
Name the characteristic of sound associated with the above observation.
Ans : Intensity of sound.

#7-a-ii
Give a reason for the above observation.

[3]

Ans : This is because the amplitude of vibration of a base drum is far greater than the amplitude of vibration of the side drum.