Question # 1

In compound microscope image formed by the eyepiece is

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Real

Inverted

erect

diminished

Which principle is in effect when a ship displaces ocean water.

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Bernouli's

Pascal's

Hook's

Archimedes

At room temperature the potential difference between the two sides of depletion region for silicon is of the order of.

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0.3 v

0.5 V

0.7 V

0.9 V

When wind blows in the same direction in which the sound travels, the sound velocity

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Decreases

Increases

Remains unchanged

Becomes zero

If the source of emf is traversed from negative to positive terminal the potential charge.

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Is negative

Is positive

Is zero

Remain the same

Natural radioactivity was discovered in.

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1978

1896

1904

1906

The energy content of a wave is proportional to its.

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Wave velocity

Wave velocity squared

Frequency

Amplitude squared

The rate of change of angular momentum of a body is equal to.

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Applied force

Moment of inertial

Applied torque

Impulsive force

On which of the following parameters capacitance does not depend upon.

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Area of the plates

Medium between the plates

Distance between the plates

Nature of material for plates

How does heat transfer between objects.

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From cold to hot objects

From hot to cold objects

By electromagnetic radiations

From hotter to hottest objects.

The division and germier experiment relates to

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Diffusion

interference

Polarization

Electron diffraction

Interference fringe spacing depends on

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The wavelength of light used

The distance screen from the coherent sources

Separation between the sources

All of the above

Which mirror be used for obtaining a parallel beam of light from a small lamp.

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Plane mirror

Convex mirror

Concave mirror

All of these

The bending of light when it enters a medium

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Reflection

Refraction

Diffraction

Total internal reflection

The heat required to sublime one mole of the substance at standard temperature and pressure is called.

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Latest heat

Specific heat

Heat of sublimation

Heat capacity

Which of the following are electromagnetic waves.

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Alpha particles

Beta particles

Gama rays

Water waves

The term used for heat capacity per unit mass is.

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Latent heat

Specific heat

Energy density

Specific energy

If the gas pressure is increased then its mean free path becomes.

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More

Zero

Infinite

Less

It the slope of velocity time graph is increasing with time the body is said to have.

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Positive acceleration

Average acceleeration

Uniform acceleration

Retardation

Which eye defect can be rectified by using diverging lens.

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Near sightedness

Far sightedness

presbyopal

Astigmatism

When a ray of light enters a glass slab from air

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Its frequency increases

Its wavelength increases

Neither frequency nor wavelength change

Its wavelength decreases

A person suffering from short sighted ness uses

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Concave lens

Convex mirror

Convex lens

Concave mirror

Photocells are used for

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Security systems

Counting systems

Automatic door system

All of the above

When a direct current is passed though a junction formed of two dissimilar metals the junction becomes warmer or cooler depending on the.

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Current direction

Thermocouple used

Temperature gradient

Amount of current

Which of the following quantities is not changed during refraction of light.

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Its direction

Its speed

Its frequency

Its wavelength

Which quantity is not affected by a magnetic field.

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Moving charge

Stationary charge

Current flowing in a conductor

Charge in magnetic flux

Fiber optics system can be used for.

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Word processing

Image processing and receiving

Image transmitting

All of the above

In four stroke cycle the crank makes

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One complete revolution

Two complete revolutions

three complete revolutions

Four complete reveolutions

All the magnetic materials lose their magnetic properties when

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Dipped in oil

Dipped in water

Heated

Cooled

The dimensions of viscosity are

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[MLT-1]

[MT-2]

[ML-1T-1]

[ML2T-1]

With which factor disputative power of a grating increases.

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Order of spectrum

Number of lines per centimeter

Order and number of lines per centimeter

Shape of the grating

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