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CBSE 12th Standard Physics Subject Electromagnetic Waves Value Based Questions 5 Mark Questions With Solution 2021

Published on: 31/05/2021

QB365 Provides the Value Based Questions Papers for Class 12 Physics, and also provide the detail solution for each and every Value Based Questions. Value Based Questions will help to get more idea about question pattern in every exams and also will help to get more marks in Exams

Download CBSE Class 12th Standard CBSE Physics question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Physics

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Std: 12th Standard CBSE - Physics

chapter: - Value Based Questions

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Questions:

Generic 5

3 x 5 = 15

Two friends went on an excursion on a hill top where temperature was quite low. One of them fell ill.The other one put a blanket on him, collected the pieces of dry wood and ignited fire in his vicinity. After sometime the ill friend felt better.
(i) What are the type of EM waves coming from fire?
(ii) Why did the ill friend feel better after sitting rear the fire?
(iii) What basic values do you learn from this study?

Shyam and his younger brother were at the restaurant. It was very clean there. None of the flies and insects were there. His younger brother asked him about the fluorescent UV lamp present at the corner. Shyam explained the functioning of UV lamp, how flies and insects get trapped by it?
(i) What are the values shown by Shyam?
(ii) Give the source of UV-rays.
(iii)Give the harmful effect of UV-rays.

Mr.Kamal and Jayant were playing football in the ground. In the middle of the match, Kamal fell down as there was a cramp in his right leg. Jayant rushed towards him and picked him up and told him not to move. They went to the nearby hospital.Doctor examined his legs and advised for an X-ray test for the confirmation of fracture.
(i) What are the values Jayant show here?
(ii) How are X-rays produced?
(iii)Can you give one other application of X-ray?

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Answers Key:

Generic 5

3 x 5 = 15

(i) The EM waves coming from the fire are infrared rays.
(ii) The infrared rays coming from the fire provide heating (soothing) effect to the body muscles of ill friend sitting near the fire. Due to it, he feels better after sometime.
(iii) We learn that the presence of mind and correct use of things available help to deal with difficult situation.

(i) Shyam is intelligent and has clarity in explaining facts.He also aware about health.
(ii) UV-rays are produced by the sun and is trapped by ozone layer.
(iii) UV-rays can cause skin cancer, so it is carcinogenic.

(i) Jayant is helpful, caring and has presence of mind to deal with adverse situation.
(ii) X-ray is produced by the bombardment of a metal target by high energy electrons.
(iii) It is used in the determination of structure of solids by X-rays diffraction method.