CBSE Class 10 Answered
This is the question from class 10 light chapter asked in our state model paper
![question image](http://images.topperlearning.com/topper/new-ate/287813IMG20210507195746.jpg)
Asked by akashsrnm | 08 May, 2021, 19:21: PM
I.(1) SI unit of electric charge :- Coulomb
I.(2) Suitable focal length to view "HallMark 916 " is 12 cm .
Reason is , we get magnified non-inverted virtual image if object is placed between focal point and lens .
Magnifying power is reciprocal of focal length . Hence smaller focal length is preferred.
I.(3) Magnetic field inside Solenoid is parallel straight line . Reson is , Magnetic field is uniform inside solenoid
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II .(4) focal length = 15 cm. For a spherical lens , if focal elngth is F , then radius of curvature is 2F
II. (5) At normal incidence, refraction of light will not take place .
If light enters at angle of incidence 90o then light will travel parallel to surface of glass slab and
there is no transmission through glas slab
II. (6)
![](https://images.topperlearning.com/topper/tinymce/imagemanager/files/ddab18f98bf06ac8d6ebb3c6b0877ec66096a675f3bb90.50369881f4.png)
II.(7)
Resistance of coductor is directly proportional to resitivity .
For transportation of electricity , conductor should have low resistance , hence conductor-A that has low resistivity is preferred
For heating coil , conductor should have high resistance , hence conductor-B that has high resistivity is preferred.
Answered by Thiyagarajan K | 08 May, 2021, 20:37: PM
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