Question # 1

The SI unit of electric field intensity is:

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NC-2

NC-1

Ns

Nm-1

Totally reflecting prism is used in:

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Periscope

Binoculars

Periscope and binocular

Telescope

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

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10m

15m

17m

20m

For observing how fast plants are absorbing phosphate fertilizer we use.

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I.131

Ph -32

Co-60

Ar-40

The mirror whose outer surface is reflecting is called:

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Concave mirror

Convex mirror

Lens

Mirror

To see from submarine the ship at the surface of water , we use:

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Telescope

Microscope

Peri scope

Prism

The principal focus of a concave mirror is:

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Virtual

Real

Imaginary

Dual aspect

If the distance between the charged bodies is much greater as compared to their sizes then the bodies are considered is:

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Positive charge

Negative charge

Point charge

Zero charge

The difference between the loudness of faintest audible sound and loudness of another sound is called:

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Pitch of sound

Quality of sound

Sound level

Intensity of sound

Old people can not hear sound above then _____ Hz

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1000

15000

20000

10000

The oscillations of a system in the presence of _____________ force are called amp oscillations:

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Resistive force

Attractive force

Both of these

None of these

In series combination of capacitors, each capacitor will have same:

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Voltage

Charge

Capacitance

Charge and voltage

The distance of image from mirror is represented by:

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q

p

F

m

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