GTHS ADIMALY

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GTHS ADIMALY

CLASS 10 PHYSICS TEST-UNIT 5 SCORE 10

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1. In which of the following medium the light has more speed

1 point

Diamond

Water

Glass

Vacuum

Clear selection

2.In the following picture the light is entering from air to the glass then it goes out to the air

1 point

$while going from air to glass ,the refracted ray$

while going from air to glass ,the refracted ray

bends to the normal

deviates away

has no change

none of these

Clear selection

3.Sin i/Sin r, is called

1 point

magnification

refraction

reflection

refractive index

total internal reflection

Clear selection

4.If the speed of light of light in water is 2.25 × 108 m/s,refractive index of water is

1 point

2.25

3.5

3.25

1.3

Clear selection

5.A pencil kept in a glass of water appears to bent.The phenomenon behind this is

1 point

reflection

refraction

total internal reflection

magnification

Clear selection

6.Which is the correct condition for total internal reflection to take place

1 point

The angle of incidence less than critical angle

Angle of incidence is equal to critical angle

Ray of light passes from a medium of lower optical density to greater optical density

Ray of light passes from a medium of greater optical density to lower opticaldensity

None of these

Clear selection

7.Which is the phenomenon related to the following picture

1 point

Total internal reflection

reflection

refraction

scattering

magnification

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8.An image is formed in a concave lens ,the position of the image is,

1 point

At 2F

Beyond 2F

Same side of the object

Between F and 2F

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9.If magnification is negative the image will be ,

1 point

real and inverted

erect and virtual

real and enlarged

none of these

Clear selection

10.An object of height 6 cm is placed at a distance of 20 cm in front of a lens, a real image is formed at a distance of 40cm.Find out the height of the image

1 point

6cm

7cm

12cm

5cm

Clear selection

Prepared by Beena KA

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