Question # 1

Which Russian Physicist first proposed the liquid drop model for the nucleus in 1928

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Niels Bohr

George Gamow

Niel Armstrong

Bill Clinton

Object may acquire an excess or deficiency of charge by

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Rubbing them together

Grounding them

Applying coulomb's principle

Shielding them

When a balloon sticks to the whiteboard It is an example of.

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Conoduction

Induction

Polarization

Conservation of charge

The radius of second orbit of hydrogen atom is

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0.071 A

0.142 A

4.752 A

9.5298 A

Which configuration is used to connect high impedance source to a low impedance lead.

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CE

CB

CC

BE

a 2,000 kg heavy truck travelling at 36 km h-1 strikes a tree and comes to a stope in 0.1 s The average force on the truck during the crash is.

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2 x 10² N

2 X 10³N

2 X 10⁴ N

2 X 10³ N

When velocity of the body is doubled, which one is doubled too.

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K.E.

P.E

Momentum

Acceleration

What is world's average surface air temperature.

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5 ^oC

10^oC

15 ^oC

20 ^oC

The magnitude of the resultant of two equal forces is equal to either to the force What is the angle between the two forces

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0 ^o

120 ^o

60 ^o

180 ^o

The SI unit of absorbed dose in.

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Bel

Weber

Rem

Grey

The bunding energy per nucleon for iron is.

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zero

Maximum

Negative

Minimum

If average acceleration is equal to instantaneous acceleration then the body's said to be moving.

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Negative acceleration

Positive acceleration

uniform acceleration

Variable acceleration

The unit formed by combining the fundamental untis of length , mass and time.

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Absolute units

Practical units

Bse unit

Derived units

Which of the following type of force can do no work on the particle on which it operates.

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Gravitational force

Frictional force

Centripetal force

Elastic force

In simple harmonic motion it is found that the total energy of a system.

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Is independent of the amplitude

Depends on the amplitude squared

Is independent of the mass

All of these

A torch bulb uses a 3 V supply and makes a current of 0.2 A It is switched on for one minute How much electrical energy is used.

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0.6 J

12 J

24 J

36 J

Which is the best sound source to produce a pure note.

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Tuning fork

Flute

Drum

Harmonium

A thin layer of oil the surface of water looks coloured due to.

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Pillarization of light

Different elements present in the oil

Interference of light

Transmission of light

Which of the following a natural example of a capactor.

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Fire

Snow

Air

Lightining

The phase different between the particles vibrating's between two consecutive nodes is.

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0

Lamda /2

2

2 lamda

A cube with sides 2 cm long is made from a material of density 8 g cm -3 What is the density of the block is.

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0.2 g cm-3

0.5 g cm-2

2 g cm-3

5 g cm-3

When forwarded bias is applied to a junction diode it.

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Increases the potential barrier

Decreases the potential barrier

Reduces the majority carrier current to zero

Reduces the minority carrier current to zero

Newton proposed his corpuscular theory on the basis on

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Newton's rings

Polarization

Dispersion of white light

Rectilinear property of light

A heat engine with 100% efficiency would have to

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Do no work

Be at a uniform temperature

Use no heat

Discharge at 0^oC

Which of the given geometries will result in the largest convection consfficient.

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Vertical plate

Diagonal plate

horizontal plate facing upwards

Horizontal plate facing downwards

The minimum angle of incidence for which total internal reflection can occur is called.

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Right angle

Acute angle

Critical angle

Obtuse angle

In open circuit electromotive force equal to

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Current

Resistance

Voltage

Inductence

The field inside a hollow spherical conductor is.

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Constantin zero

Constant but not necessarily zero

A function of charge on sphere

a function of distance from the centre

A diatomic gas contains only

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Translational K.E.

Rotational K.E.

Vibrational K.E.

All of these

Two electrons approach each other their relative velocity will be.

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Zero

c

c/2

Infinity

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

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