Question # 1

β-particles are easily deflected by collisions than heavy

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α-particles

β-particles

γ-particles

none of these

The unit of work in CGS system is

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Joule

Erg

Dyne

Watt

when the deformation produced in the material become permanent, this type of behaviour is called

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proportionality

elasticity

plasticity

none of them

Radioactivity was discovered by

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Rutherford

Henri Becqureal

Maxwell

James Chadwick

A car battery has e.m.f 12 volt and internal resistance 5 x 10^-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

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5 volt

3 volt

15 volt

9 volt

Work done is maximum when angle between force and displacement is

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0°

90°

180°

None of these

The current that flows through the coil of a motor causes:

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Its shaft to revolve

Its brushes to rotate

Motor to move

Its shafts to rotate

None of these

The earliest heat engine was

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petrol engine

diesel engine

electric engine

steam engine

The electrical forces between the molecules of a liquid are

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Repulsive

Attractive

Both A and B

None

The results of spectra obtained by Blamer were expressed in 1896 by

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Bohr

Rydberg

Planck

Rutherford

Coulomb

Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons

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Frequency

Penetrating power

Energy

Method of creation

When a stress changes the shape, it is called the

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compressional stress

tensile stress

shear stress

any one of them

The velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s.The velocity 3s before in m/s is:

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8

4

6

7

The ultimate tensile strength of the material can be regarded as

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Maximum strength

Nominal strength

No strength

None of these

The binding energy per nucleon is:

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Greater for heavy nuclei

Least for heavy nuclei

Greatest for light nuclei

Greatest for medium nuclei

The speed of the secondary wavelets as mentioned in Huygen's principle is ________ the speed of propagation of the wave itself

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Equal to

Greater than

Smaller than

None of these

The viscosity of fluid is described by

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Resistive forces of fluid

Frictional effect between different layers of a fluid

Flowing speed of fluid

None of these

Fire optics has ability to transmit

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Thousand telephone conversation

Several television programs

Numerous data signals between stations

All of these

As 1 ohm x 1 farad = 1 second For MΩ x PF =

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Second

ms

μ s

Ms

The transition of from solid to liquid is actually from:

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Order to disorder

Disorder to order

Order to order

Disorder to disorder

The two forces of a couple do not follow the rule that

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They act on the same angle

They act in the opposite directions

They have same directions

They cancel out each other

If N is the number of rulings on the grating, then the resolving power in the mth order diffraction equals to

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R = N × m

R = N/m

R = m/N

R = N × m²

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