Sainik School New pattern Class IX

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Defence Academy Coimbatore A leading coaching academy for Sainik, Military and RIMC Schools, NDA, IMA, AFCAT SSB, FSB Interview http://www.ssbcoaching.com call 094437 20076




Question 1

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Question:   Light is a form of energy produced by a ______.
1.luminous object
2.transparent object
3.non-luminous object
4.opaque object
Answer:    1

Question 2

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Question:   An example for non-luminous object is ___________.
1.a candle
2.the sun
3.an electric bulb
4.the moon
Answer:    4

Question 3

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Question:   The phenomenon by which the incident light falling on a surface is sent back into the same medium is known as ________.
1.polarization
2.reflection
3.refraction
4.absorption
Answer:    2

Question 4

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Question:   When light is incident on a polished surface ___________ reflection takes place.
1.regular
2.irregular
3.diffused
4.normal
Answer:    1

Question 5

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Question:   An object becomes invisible when it undergoes ______ reflection.
1.regular
2.irregular
3.diffused
4.normal
Answer:    1

Question 6

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Question:   According to the laws of reflection,
1.imagei = imager
2.imagei > imager
3.imager > imagei
4.image

Answer:    1

Question 7

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Question:   The image formed by a plane mirror is always _______.
1.real and erect
2.virtual and erect
3.real and inverted
4.virtual and inverted
Answer:    2

Question 8

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Question:   The centre of the sphere of which the spherical mirror forms a part is called ____________.
1.centre of curvature
2.focus
3.pole
4.vertex
Answer:    1

Question 9

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Question:   The focus of a concave mirror is ________.
1.real
2.virtual
3.undefined
4.at the pole
Answer:   2

Question 10

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Question:   A converging mirror is known as ________.
1.convex mirror
2.plane mirror
3.concave mirror
4.cylindrical mirror
Answer:    3

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