CLASS 10 {Boardwallah}
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| 2 | MCQS OF LIGHT CHAPTER
1.The SI unit of power of a lens is:
A) Metre
B) Dioptre
C) Watt
D) Joule
2.Which mirror is used as a shaving mirror?
A) Plane mirror
B) Convex mirror
C) Concave mirror
D) None of these
3.The image formed by a plane mirror is:
A) Real and inverted
B) Virtual and erect
C) Real and erect
D) Virtual and inverted
4.A convex lens is also known as:
A) Diverging lens
B) Converging lens
C) Cylindrical lens
D) Plane lens
5.The bending of light when it passes from one medium to another is called:
A) Reflection
B) Refraction
C) Dispersion
D) Scattering
6.The focal length of a plane mirror is:
A) Zero
B) Infinity
C) One metre
D) Negative
7.The mirror formula is:
8.Which mirror is used as a rear-view mirror in vehicles?
A) Plane mirror
B) Concave mirror
C) Convex mirror
D) None of these
9.The image formed by a convex mirror is always:
A) Real and inverted
B) Virtual, erect and diminished
C) Real and magnified
D) Virtual and magnified
10.The refractive index of air is approximately:
A) 1
B) 1.33
C) 1.5
D) 2
11.The power of a lens is measured in:
A) Watt
B) Metre
C) Dioptre
D) Newton
12.A concave lens always forms an image that is:
A) Real and inverted
B) Virtual, erect and diminished
C) Real and magnified
D) Virtual and magnified
13.According to the law of reflection:
A) Angle of incidence = Angle of reflection
B) Angle of incidence > Angle of reflection
C) Angle of reflection = 90°
D) None of these
14.Which lens is thicker at the centre than at the edges?
A) Concave lens
B) Convex lens
C) Cylindrical lens
D) Plane lens
15.The image formed by a convex lens when the object is beyond 2F is:
A) Real, inverted and diminished
B) Virtual and erect
C) Real and magnified
D) Virtual and magnified
16.The power of a concave lens is:
A) Positive
B) Negative
C) Zero
D) Infinite
17.The principal focus of a concave mirror is:
A) Behind the mirror
B) At infinity
C) In front of the mirror
D) At the pole
18.The speed of light is maximum in:
A) Water
B) Glass
C) Air
D) Vacuum
19.A ray passing through the optical centre of a convex lens:
A) Bends towards the principal axis
B) Retraces its path
C) Passes undeviated
D) Reflects back
20.The mirror used in solar cookers is:
A) Plane mirror
B) Convex mirror
C) Concave mirror
D) Cylindrical mirror | 990 |
| 3 | Anyone who has doubts regarding academics or others
Contact via bot
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| 6 | ⚠️ IMPORTANT ⚠️
Best Books to start your preparation for new session 2026-27 !! Read these books and do all questions 😉 you can get 90-95% easily ( but do these books completely)
Based on new 2026-27 syllabus
Class 9th -https://bit.ly/3V3QRYC
Class 10th- https://bit.ly/3ViMnib
Class 11th - https://bit.ly/3yBCT90
Class 12th - https://bit.ly/3VjU5c0
Jee + Neet - https://bit.ly/4e2UgQb
Download and save these PDFs before deleting !! It may get deleted anytime 🥺🥹
This year many questions were directly from this book only so download it fast for next session | 533 |
| 7 | ⚠️ IMPORTANT ⚠️
Best Books to start your preparation for new session 2026-27 !! Read these books and do all questions 😉 you can get 90-95% easily ( but do these books completely)
Based on new 2026-27 syllabus
Class 9th -https://bit.ly/3V3QRYC
Class 10th- https://bit.ly/3ViMnib
Class 11th - https://bit.ly/3yBCT90
Class 12th - https://bit.ly/3VjU5c0
Jee + Neet - https://bit.ly/4e2UgQb
Download and save these PDFs before deleting !! It may get deleted anytime 🥺🥹
This year many questions were directly from this book only so download it fast for next session | 33 |
| 8 |  没有文字... | 564 |
| 9 | Wisdom gives direction and desire fuels it. | 466 |
| 10 | The single greatest skill you can develop is the ability to stay in a great mood in the absence of things to be in a great mood about.
- Alex | 547 |
| 11 |  没有文字... | 795 |
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| 13 | How is preparation going..... | 850 |
| 14 | Hey 👋 board aspirants | 837 |
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| 16 | Anyone need any material
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| 17 | Any query? | 561 |
| 18 | 🔥Nationalism in India – Timeline🔥 @iitianpatrika
1915 -- Mahatma Gandhi returned to India.
1916 --Gandhiji travelled to Champaran to inspire peasants against the oppressive plantation system.
1917 --- Gandhiji organised Satyagraha in Kheda district of Gujarat.
1918 --- Gandhiji went to Ahmedabad to organise Satyagraha among cotton mill workers.
1918-19 ---Distressed Uttar Pradesh peasants organised by Baba Ramchandra
1919 --Khilafat Committee was formed in Bombay.
1919 --- Hartal against Rowlatt Act;
1919----Jallianwalla Bagh Massacre
1920---Gandhiji convinced other leaders of the need to start a Non-Cooperation Movement in support of Khilafat as well as for Swaraj in Calcutta Congress Session.
1921-- Non-Cooperation and Khilafat Movement launched.
1922 ---Incident of Chauri Chaura; Gandhiji withdrew Non-Cooperation Movement.
1924 ---Alluri Sitaram Raju arrested ending a two years armed tribal struggle.
1927---Federation of the Indian Chamber of Commerce and Industries (FICCI) was formed.
1928-- The Simon Commission arrived in India.
1928 --- The Hindustan Socialist Republic Army (HSRA) was founded.
1929 --- Lord Irwin announced a vague offer of ‘dominion status’ for India.
1929 ---Lahore Congress; Congress adopted the demand for ‘Puma Swaraj’.
1930---- Dr BR Ambedkar established Depressed Classes Association.
1930 ---- Gandhiji begins Civil Disobedience Movement by breaking Salt Law at Dandi.
1931---- Gandhiji ends Civil-Disobedience Movement; Gandhi-lrwin Pact; Second Round Table Conference.
1932---Poona pact signed between Dr Babasaheb Ambedkar and Mahatma Gandhi; Civil Disobedience Movement relaunched.
♥For more important short notes and regular chapter quizes join this channel students👍👍👍.
@iitianpatrika | 545 |
| 19 |  没有文字... | 530 |
| 20 | Ask your doubt 🧐 | 658 |
