10th Standard Syllabus & Materials
10th Standard
TN 10th English Prose - 4 - The Attic Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Supplementary - 3 - The Story of Mulan Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Poem - 3 - I am Every Woman Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Prose - 3 - Empowered Women Navigating The World Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Supplementary - 2 - Zigzag Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Poem - 2 - The Grumble Family Important Questions And Answers Study Material - QB365 Set A
Published on: 05/12/2020
10th Standard Science Optics English Medium Free Online Test 1 Mark Questions 2020-2021
Download Tamil Nadu 10th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
To increase the magnification of the telescope, the focal length of the ______
Objective lens is small and eye lens is large
Objective lens is large and eye lens is small
Objective lens and eye lens are small
Objective lens and eye lens are large
2.
In compound microscope ______ lenses are used.
2
3
4
1
3.
4.
As compare to single lens, compound microscope gives ______
Smaller of eye lens of an adult human being is a 3D
4D
5D
6D
5.
In compound microscope, as compare to eye piece, objective lens has _____ focal length.
-ve focal length
Zero
Small
Large
6.
7.
In Astigmatism, eye cannot see
distance object
nearby object
parallel lines
both a & b
8.
When a person is myopic, he / she can clearly see
Both nearby & far off
Only nearby objects
Only far off objects
Neither nearby nor far off objects
9.
The change in the focal length of human eye is caused by
Pupil
Ciliary muscles
Cornea
Iris
10.
An object is placed 25 cm from a convex lens whose focal length is 10 cm. The image distance is _______ cm.
50
16.66
6.66
10
11.
Convex lens forms a highly diminished, real and inverted image, when an object is at
infinity
F
below F & c
beyond 2 F
12.
When a person uses a convex lens as a simple magnifying glass, the object must be placed at a distance
less than one focal length
more than one focal length
less than twice focal length
more than twice the focal length
13.
A convex lens forms a virtual image if the object is
at F
At infinity
below F and 2 F
below the lens and the principal focus
14.
The scattered light in Raman scattering contains _____ lines
Rayleigh's
stokes
Antistokes
all above
15.
The splitting up of white light into colours is called
reflection
refraction
scattering
dispersion
16.
The velocity of light is _______
3 x 10-8 ms-1
3 x 108 ms-1
3 x 108 km s-1
3 x 10-8 km s-1
17.
Which of the following lens would you prefer to use while reading small letters found in a dictionary?
A convex lens of focal length 5 cm
A concave lens of focal length 5 cm
A convex lens of focal length 10 cm
A concave lens of focal length 10 cm
18.
Power of a lens is –4D, then its focal length is
4m
–40m
–0.25 m
–2.5 m
19.
Where should an object be placed so that a real and inverted image of same size is obtained by a convex lens
f
2f
infinity
between f and 2f
1.
(b)
Objective lens is large and eye lens is small
2.
(a)
2
3.
(b)
4.
(b)
4D
5.
(c)
Small
6.
(c)
7.
(c)
parallel lines
8.
(b)
Only nearby objects
9.
(b)
Ciliary muscles
10.
(b)
16.66
11.
(a)
infinity
12.
(a)
less than one focal length
13.
(d)
below the lens and the principal focus
14.
(d)
all above
15.
(d)
dispersion
16.
(b)
3 x 108 ms-1
17.
(a)
A convex lens of focal length 5 cm
18.
(c)
–0.25 m
19.
(b)
2f
10th Standard Syllabus & Materials
10th Standard
TN 10th English Prose - 2 - The Night the Ghost Got in Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Supplementary - 1 - The Tempest Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Poem - 1 - Life Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Prose - 1 - His First Flight Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
