Question # 1

In case of a convex lens when object is placed away from 2F, image is formed.

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at F

at 2F

away from 2 F

Between F and 2 F

Which one of the following is not a dimensionless quantity.

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Radian

pi

Decibel

Force

When an object moves with a very high speed the length in the direction of motion.

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Contracts

Expands

Remains the same

Becomes infinity

the depth of a pond is 4 m What is the apparent depth of the pond if the water level is 3.5 m high. The refractive index of water is 1.33

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1.9 m

2.3 m

3.13 m

4.5 m

How solid hydrogen is obtained.

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By cascade process

By joule kelvin effect

By adiabatic expansion

Lowering temperature below melting point

A vacuum diode conducts when plate

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Is negative w.r.t cathode

Is positive w.r.t. cathode

and cathode are at the same potential

Resistance is less

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

The first successful quantitative theory of atomic structure was formulate by

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David Bohm

Louis de Broglie

Neil Bohr

J Jj. Thomson

The diver spins faster when moment of inertia becomes

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Smaller

Greater

Double

zero

Light year is a unit of

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Light

Velocity

Time

Distance

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

Dispersive power of a prism depends upon the wavelength of the light used and is

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More for large wavelengths

Less for large wavelengths

More for small wavelengths

Less for small wavelengths

Potential of earth's surface is.

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Negative

Positive

Zero

Infinite

Which of the following is a thermodynamic temperature scale.

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Celsius scale

Fahrenheit scale

Kelvin scale

Rankine scale

The sensitiveness of a moving soil galvanometer can be increased by

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Decreasing the number of turns of the coil

Decreasing the area of the coil

Increasing the couple per unit twist of the suspension

Increasing the magnetic flux

The locus of all points in a medium having the same phase of vibration is called.

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Creast

trough

Wavelength

Wave front

Who pointed out that both wave and particle aspects are required for the complete description of both radiation and matter.

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Davison and Germer

J.J.Thomson

Neil Bohr

Compton

The decimal equivalent of 1111 is

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5

10

15

120

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

A solid state detector is basically

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A reverse biased p-n junction

A forward biased p-n junction

A p-n -p transistor

A n-p-n transistor

The centre of gravity of a rectangular or parallel gram shaped plate is.

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At the centre

At the intersection of diagonals

At the intersection of medians

At the axis of rotation

Eye colour is the colour of

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Iris

Retina

Comea

Pupil

For an A.C. circuit the power factor is

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Always les than one

Always greater than one

Always equal to one

Absent

A force of 50 N acts on a body for 10 s What will be change in momentum.

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5 Ns

500 Ns

200 Ns

800 N s

Difference between the molar heat capacity constant pressure and that a constant volume is equal to

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Root mean square velocity

Mean free path

Boltzmann's constant

Universal gas constant

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

Which of the following are examples of transverse and a longitudinal wave.

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Radio and sound waves

Radio and light waves

Light and water ripples

Light and sound waves

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

Which of the following phenomenon is observed in obtaining an X ray photograph of our hand.

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Photoelectric effect

Zeeman effect

Shadow photography

Ionization

Who developed the first atomic reactor.

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Bohr

Fermi

Rutherford

Taylor

Which of the following is an example of induced magnetism.

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A compass needle pointing north

A north pole attracting iron filings

A northpole repelling a north pole

The coil of a motor turning in a magnetic field.

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