Question # 1

The value of refractive index of water is:

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2.33

1.36

1.33

1.39

The product of frequency and wavelength is equal to:

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Time period

Amplitude

Wave speed

Wave energy

With broadband information can be loaded:

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In 1 min

In 1 sec

In 1 day

In 2 days

1 MB =

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1022KB

1023KB

1024KB

1025KB

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

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Telescope

Microscope

Periscope

Prism

The sound level of rustling of leave is:

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1 dB

20 dB

30 dB

10 dB

As the temperature of a conductor rises, its resistance:

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Increases

Decreases

Does not change

None of these

Which is the most suitable means of reliable continuous communication between an orbiting satellite and Earth?

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Microwaves

Radio waves

Sound wave

any light waves

Which instrument is used to detect current?

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Galvanometer

Voltmeter

Ammeter

Electroscope

Which type of energy is converted into mechanical energy in the D.C. Motor.

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Magnetic energy

Heat energy

Electrical energy

Chemical energy

Which is the most suitable means of reliable continuous communication between an orbiting satellite and earth:

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Mecrowaves

Radio waves

Sound waves

Any light waves

In fixed capacitor dielectric used is:

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Paper

Metal

Mica

Paper & mica

Optical fibres works on the principle of:

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Reflection

Refraction

Total internal reflection

Diffraction

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