Test Details

Science Part Test 1 : Physics Section

Syllabus: Light

Oct 20, 8:00 AM

45 minutes

Oct 20, 11:59 PM

25.0 marks

MCQ

20 questions

Shiv Narayan Kumar

Three years of excellent teaching and mentoring experience. Aimed to provide the most effective teaching methodology to assure quality and indepth education of Science. SHIV NARAYAN SIR (Faculty of Physics )

Class Details

PCM

Class 10

PCM

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Question Text

Question 2 :
Which of the following are common to images formed by both Concave and Convex lens ?

Question 3 :
State whether given statement is True or False A ray of light incident parallel to the principal axis of a lens, passes undeviated after refraction.

Question 4 :
A photograph of a horse is taken by a camera whose lens has been painted with black stripes. The photograph will be of a :

Question 6 :
If in a plano-convex lens, the radius of curvature of the convex surface is 10 cm and the focal length of the lens is 30 cm, then the refractive index of the material of lens will be

Question 8 :
If an object is placed at '$$C$$' of a concave mirror, the position of the image is ______

Question 9 :
$$ \dfrac{\sin i}{\sin r}  =$$constant, the value of constant depends upon a) Pair of media b) Color of incident light c) Wave length d) Refracting nature of material

Question 10 :
Lens A produces a magnification of -0.8 whereas lens B produces a magnification of +0.8. Which one of the following applies to lenses A and B?

Question 11 :
Which of the following is not an application of convex lens?

Question 13 :
State whether true or false:The angle of incidence is always smaller than angle of refraction when a ray travels from air to glass, at an oblique angle

Question 14 :
When the height of the image is less than the height of the object, then magnification will be

Question 15 :
Four students perform an experiment on tracing the path of a ray of light passing through a rectangular glass slab. Their individual observations are: identify the incorrect observation and correct them.

Question 16 :
Two thin lenses of focal lengths $$20 cm$$ and $$25 cm$$ are placed in contact. The effective power of the combination is

Question 17 :
The image distance of an object placed $$10\ cm%$$ in front of a thin lens of focal length $$5cm$$ is

Question 18 :
A ray of light in a liquid of refractive index $$1.4$$ approaches the boundary surface between the liquid and air at an angle of incidence whose sine is $$0.8$$. Which of the following statement is correct about the behaviour of the light?

Question 19 :
A lens forms a diminished and erect image of an object. The magnification is $$\frac {1}{4}$$. Find ratio of distance between object and focus and focus and image

Question 20 :
Light of wavelength$$\displaystyle 6600\overset { \circ }{ A }$$ travelling in air gets refracted in water. If the speed of light in air is$$\displaystyle 3\times { 10 }^{ 8 }{ m }/{ s }$$ and R.I of water is 4/3. Find frequency of light in air.

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