Question # 1

The strength per unit volume of a solid is called.

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shear stress

Shear strain

Bulk strength

Bulk modulus

A Fly is found to be sitting on a telescope when it is focused towards the moon What effect is expected on the photograph of the moon.

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Intensity remains unchanged

No effect

The complete field of view is blocked

Coloured image will be seen

The process of pair production will take place if the energy of photon is greater than

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0.21 MeV

0.51 MeV

1.51 MeV

1.21 MeV

The energy transported by a wave is proportional to the square of the.

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Wavelength of the wave

Period of the wave

Amplitude of the wave

Frequency of the wave

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

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Entropy

Enthalpy

Isothermal conduction

Adiabatic conduction

The necessary condition for nuclear fusion is.

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High temperature and high pressure.

Low temperature and high pressure

Low temperature and low pressure

High temperature and low pressure.

Which of the following are sources of direct current.

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Batteries

Solare cells

Thermocouples

All of these

While passing through the atmosphere total energy is reduced due to.

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scattering

Absorption

Reflection

All of these

The magnitude of resultant of three forces is 3. Its x -component is 2 and y component is 1, then its z-component will be.

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1

2

3

4

With which factor disputative power of a grating increases.

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Order of spectrum

Number of lines per centimeter

Order and number of lines per centimeter

Shape of the grating

Efficiency of a Carnot engine can never be 1 or 100% unless cold reservoir is at absolute temperature.

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0 K

100 K

273 K

373 K

The energy following per second through a unit area held perpendicular to the direction of wave is.

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The loudness of the sound waves

The pitch of the sound waves

The intensity level of sound waves

The intensity of sound waves

Since light rays are always diverged by concave lenses such lenses

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Cannot form images

Form only black and white images

From only invented image

Form only erect images

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

White light a tungsten filament lamp is passed through sodium vapor and viewed through a diffraction gritting Which of the following best describes the spectrum which would be seen.

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Coloured lines on a black background

Coloured lines on a white background

Dark lines on a coloured background

Dark lines on a white background

Two vectors of magnitudes 5 N and 7 N respectively are acting on a body if the angle between them is a right angle, their resultant vector will be.

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2 N

4 N

6 N

8 N

Which vector gives the displacement from one point to another in space.

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Position vector

Unit vector

Null vector

Distance vector

How eddy current losses are reduced in A F and R F transformers.

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By using air cores

By using shell cores

By using laminated cores

By using ferrite cores

Temperature of a system remains constant in

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Adiabatic process

Isobaric process

Isothermal process

Isochoric process

The electric supply line in houses works at 220 V what will be the amplitude of emf.

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120 V

331 V

220 V

440 V

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

LASER is a device which can produce.

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Monochromatic beam of light

Coherent beam of light

An intense beam of light

All of the above

The work done is moving a very small charge in an electric field from one point to another is

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Independent of the path

Equal to the potential difference between the two points.

Measured in V m-1

Measured in J c-1

A car is travelling with uniform acceleration the road has check posts every 100 m When the car passes one post , it has a speed of 10 m s-1 and when passes the next one its speed is 20 ms-1 What is the cars acceleration.

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0.67 m s-2

1.5 m s2

2.5 m s-2

6.0 m s-2

No entropy change is associated with

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Isothermal process

Adiabatic process

Isochoric process

Isoteric process

Which of the following is an example of irreversible process.

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Melting of ice

Work done against friction

Pettier heating and cooling

All isothermal and adiabatic changes

The bending of light when it enters a medium

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Reflection

Refraction

Diffraction

Total internal reflection

A pure choke consumes

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No power

Maximum power

Minimum power

Average power

Which of the following is a clinical thermometer.

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Gas thermometer

Mercury thermometer

Alcohol thermometer

Radiation thermometer

When a force of 4 N acts on a body of mass 2 kg for a time of 2 s, the rate of change of momentum is.

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2 kg ms -1

4 kg ms-1

8 kg m s-1

16 kg m s-1

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

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