Question

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Question in attachment

Physics I need answer with reason....!!

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Answer 1

Answers

7. D

Explanation:

As the temperature increases, the wire expands following the formula l' = l( 1 + a∆T).

8. C

Explanation :

When the object lies between C and F for a concave mirror, image lies beyond C. ( between C and infinity).

9. A

Explanation :

It is because of refraction due to the glass slab that the text appears to be raised.

10. D

Explanation :

The angle of incidence is the angle between incident ray and the normal. Similarly, angle of refraction is the angle between the retracted ray and the normal.

Answer 2

Required Answer :-

7) It sags and touches cars on the road (it expands)

8) Between C and infinity

9) Refraction

10) 2 and 4

More o know :-

7) We know that when temperature increase then the object also expands. Example :- When iron is rusted then it expand. This is due to the increase in temperature randomly.

8) We may see that the mirror is a concave mirror and point AB will lie between C and infinity because, the object is lying between the curvature and focal length

9) Glass slab is a transparent object and when the text viewed it shows the refraction of text.

10) We know that an object lies between the ray of light coming through the normal. 2 is the ray of light and 4 is the normal