Question # 1

The principal of light on whihc the fibre optics works is.

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Reflection

Refraction

Total internal reflection

Dispersion

What discovered radioactivity?

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Einstein

Newton

J.J. Thomson

Henry Becquerel

Radioactivity occurs naturally from all the elecments with atomic number greater than.

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62

72

80

82

The Phenomenon of emission of radiations from radioactive elements is called:

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Doping

Allotropy

Radioactivity

Induction

Frequency of ultrasound is.

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Less than 20 Hz

20 KHz

30 KHz

More than 20 khn

Laser is used toproduce three -Dimensional image called.

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Holograms

Holography

Lithotropsy

Radioactive elements

In ........ henry Bequeral discovered.

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1895

1886

1896

1898

The process of manufacturing food in pants;

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Respiration

Digestion

Fermentation

Photosynthesis

The charge on alpha particle is:

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1

2

4

6

Which radiation have zero mass number

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Alpha radiation

Beta ratiation

Gamma radiation

None of these

Emission of ratiations from nucleus is said to be

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Chemical reaction

Atomic reaction

Radioactivity

Nuclear fission

When a ray of light passes from a denser to a rare medium it;

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bends away form the normal to the interface

bends towards the normal

does no bend

non of the above

The number of hydrogen isotopes;

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3

2

8

10

The mass of Beta particle:

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0

4

2

1

Recording of electrical activity of brain is said to be:

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ultrasound

MRI

E.E.G

E.C.G

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