Question # 1

Drag force between two layers under consideration depends on

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Distance between the layers

Surface area of layers

Relevant velocity between them

All of the above

The SI unit of modulus of elasticity us

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N m-2

N m-1

N m

N m -3

The word amorphous means

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With regular structure

Without structure

May have regular structure

Thermoplastics

Tesla is the unit for measuirng

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Magnetic intensity

Magnetic induction

Magnetic moment

Electric potential

What is the necessary condition for Boyle's law to hold good.

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Isothermal

Adiabatic

Isobaric

Isochoric

The relation between work function and maximum energy of photo electrons was discovered by.

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Stefan

Marely

Einstein

Max. Planck

Thermocouple is used for

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Converting atomic energy into heat energy

Measure the radiant energy

Storing the heat energy

Measuring current

If gravitational field is not uniform over the extended object or system of point masses the centre of mass and centreof gravity will

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Be antiparallel

Not coincide

Coincide

Be perpendicular

Who studied the change in velocity with the help of geometry for the first time.

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Nicole Oresme

Galileo

Alberuni

Ibn al haithem

If an athlete uses 50 J of energy to lift a load in 2 s his muscular power is.

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125 W

250 W

500 W

1,000 W

The decay to form other nuclides by emitting particles and electromagnetic radiations by unstable nuclides is called.

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Nuclear stability

Radioactivity

Carbon dating

Spontaneously

If we place oure hand below a lighted lamp we feel warmer due to.

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Conduction

Convection

Radiation

None of these

The thermal inertia of a thermodynamic system is known as its.

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Entropy

Enthalpy

Isothermal conduction

Adiabatic conduction

Which of the following causes the deflection of Alpha particles when they re passed through a thin foil.

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Attraction of nucleus

Collision with nuclei

Interactions with electrons

Electrostatic repulsion by the nucleus

If the rate of change of momentum w.r.t Time is zero then

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Momentum is a function of time

Momentums is not conserves

Momentum is constant

The impulse is into he same direction as the momentum

On which factor cut off wavelength of X-rays coming from a Coolidge tube depends upon.

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Target material

Accelerating voltage

Filament temperature

Separation between target and the filament

A charged particles moving in a magnetic field experiences a resultant force.

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Proportional to its K.E.

In the direction of the field

In the direction opposite to its motion

In the direction perpendicular to both the field and its motion

The relation between angle of incidence and angle of refraction is known as.

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Snell's law

Refractive index

Index of refraction

All of the above

What is the triple point of water.

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273 .15 K

0 K

100 K

0 oC

The ration of intensity of magnetization to the magnetic force is known as.

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Parmeability

Magnetic induction

Magnetic intensity

Magnetic susceptibility

When a force of 16 N acts on a mass of 4 kg for a time of 4 s. What is the rate of change of momentum.

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1 kg m s-2

4 kg m s-2

8 kg m s-2

16 kg m s-2

The total energy of the hydrogen atom is

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zero

Infinite

positive

Negative

Charge to mass ration of an electron is determined by using the relation.

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e/m = B/rv

e/m = r/vB

e/m = V/Br

e/m = v/r

Good acoustic implies

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Obtaining as much reverberations as possible

Making the reverberation as small as possible

Obtaining the optimum of reverberations

Eliminating reverberations

One calorie equals to

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1.2 J

2.2 J

3.2 J

4.2 J

A device used to determine mass of an isotope quite accurately is known as.

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Spectrometer

Mass spectrometer

Mass detector

Electronic balance

The division and germier experiment relates to

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Diffusion

interference

Polarization

Electron diffraction

The Step up transformer

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Increase the input current

Increases the input voltage

Has more turns in the primary coil

Has less time in the secondary coil

Which six particles and their antiparticles interact by the weak interaction.

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Leptons

Hadrons

Muons

pi mesons

The property of an object that causes it to create a magnetic field in opposition to an externally applied magnetic field is.

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Paramagnetism

Diamagnetism

Ferromagnetism

Demagnetism

Two pure inductors each of self inductance L are connected in parallel The total inductance of the combination is.

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L

2L

L/2

L/4

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