Question # 1

Intensity level of the sound produced by mosquito buzzing is:

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70 dB

40 dB

10 dB

120 dB

The half life of radium 226 is

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1600 year

1610 years

1620 years

1630 years

The waves, which are used to detect the broken bones, are called:

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Light waves

x-rays

Sound waves

both b,c,

The electrostatic force acting on two charges each of 1 C separated by 1m is about .

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9 x 10⁹ N

9 x 10^-9N

9 x 10⁸N

9 x 10^-8N

the part of waves at which particles of the medium are below the normal position are called:

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extreme position

crest

trough

compression

The wave properties

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Reflection

Refraction

Diffraction

All of these

To hear echoes, the minimum distance of the obstacle from source of sound should be:

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10m

15m

17m

20m

SI unit of electric potential is:

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Watt

Volt

Coulomb

Joule

In fixed capacitor dielectric used is:

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Paper

Metal

Mica

Paper & mica

1.6x10^-19 J= :

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1F

1N

1eV

The index of refraction depends on:

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The focal length

The speed of light

the image distance

The object distance

Which animal have ability to move his eye lens:

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Snake

Fish

Ant

Tiger

Electronics is a branch of:

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Mass

Applied Physics

Mechanics

Nuclear Physics

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