Question # 1

What would be the magnitude and direction of acceleration which would made the spring balance reading zero.

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Zero

1 m s-2 upward

9.8 m s-2 upward

9.8 m s-2 downward

The average energy released per fission of U is about

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200 eV

2 keV

2 MeV

200 MeV

The converse of pair production is

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Annihilation of matter

Materialization

Compton effect

Photo electric effect

In the experiment of production of X rays electrons are accelerated towards the anode by

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Thermionic emission

Potential difference

Breaking potential

Cut of current

The cathode ray oscilloscope is used

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For viewing the wave shape of rapidly changing electric current

As voltmeter

For measuring time intervals between electricalimpulses

All of the above

The centre of gravity of a body is

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The centre of the body

The point at the mass of the body acts

The point at which the whole weight of the body acts

The point of rotation

Which of the following phenomenon occurs when two sound waves of equal amplitude and different frequencies travel through the same region.

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Doppler's effect

Resonance

Beats

Echo

The particles less in mass than protons are

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Measons

Bosons

Baryons

Nucleons

Which both elements are good for nuclear fission.

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Thorium an uranium

Thorium and radium

Plutonium and uranium

Plutonium and throrium

The half life of uranium -238 is

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1620 years

4.5 x 10⁹years

3-8 days

23.5 minutes

A convex lens of focal length 6 cm to be used to from a virtual image three times the size of the object Where must the lens be placed.

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1 cm

2 cm

3 cm

4 cm

In case of longitudinal waves the individual particles of the medium move.

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In circles

In ellipses

Parallel to wave propagation

Perpendicular to wave propagation

What happens to internal energy of a piece of lead when hammered.

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Increases

Decreases

Remains unchanged

Becomes zero

An object moves 5.0 m north and then 3.0 m south . Find both the distance travelled and the magnitude of the displacement vector.

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2.0 m, 8.0 m

8.0 m, 2.0 m

8.0 m, 8.0 m

2.0 m, 2.0 m

Who discovered a phenomenon of thermos electricity.

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Peltier

Joule

Seeback

thomson

The permeability of a diamagnetic material is

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Greater than unity

Less than unity

Equal to unity

Zero

The wave nature of light was proposed by

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Thomas Young

Fresnel

Maxwell

Huygen

The phase velocity is the velocity of a point that moves with a wave at constant phase it is also called.

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Phase speed

Wave speed

Wave velocity

All of these

Which part of hole located in the centre of the eye that allows light to enter the retina.

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Iris

Pupil

Cornea

Fovea

The direction of force on a moving negative charge will be.

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Opposite to that of positive charge

Similar to that of positive charge

At right angel to the positive charge

Parallel to the positive charge

The terminal velocity in case of spherical droplet is directly proportional to.

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Square of the radius of the droplet

Radius of the droplet

Cube of the radius of the droplet

Half of the Radius of the droplet half

Condenser is used

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To produce charge

To change the direction of current

To collect the charge

As a good conductor of electricity

The emission of electrons from a metal surface when exposed to light of suitable frequency is called.

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Pair production

Compton effect

Photo electric effect

Zeeman effect

The typical value of forbidden energy gap in germinium is.

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0.7 eV

1.0 eV

1.4 eV

10 eV

The branch of medicine which deals with the anatomy physiology and diseases of the eye

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Ophthalmology

Radiology

Cardiology

Andrology

Which of the following should not change in an Isothermal process.

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Volume

Pressure

Temperature

All of these

If we double both the current and the voltage in circuit while keeping its resistance constant the power.

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Remains unchanged

Halves

Doubles

quadruples

The bending of light when it enters a medium

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Reflection

Refraction

Diffraction

Total internal reflection

An example of simple harmonic motion is

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Fast moving cricket ball

Motion of bicycle

Motion of a bee

Motion of simple pendulum

To produce beats it is necessary to use two waves.

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Travelling in opposite direction

Of slightly different frequencies

Of equal wavelengths

Of equal amplitudes

Which scientist announced for the first time that the universe is expanding.

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Einstein

Newton

Edward Hubble

Karl Marx

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