Question # 1

The maximum displacement from the undisturbed position of the medium to the crest top is called.

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Wavelength

Amplitude

Period

Frequency

a 5 kg mass is falling freely the force acting on it will be.

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0 N

9.8 N

5 N

19.6 N

A spring obeying Hooke's law has an upstretched length 50 mm and a spring constant of 400 N m-1 What is the tension in the spriing when its overall length is 70 mm.

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8 N

28 N

160 N

400 N

One particle having zero mass and zero charge is.

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Positron

Electron

Neutrino

Neutron

What is the SI unit for thermal conductivity.

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W m-1 K-1

W m-2 k-2

W m-3 k-1

J kg -1 k-1

Isotopes are the atoms of the same elements which contain equal number of.

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Nucleus

Neutrons

Protons

Electrons

The condition of complete equilibrium is satisfied if.

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Vector sum of all the torques is zero

Vector sum of all the forces is zero

Vector sum of all the forces and torques is zero

Angular acceleration is zero

In order to reduce uncertainty in momentum one must use light of.

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Short wavelength

Large wavelength

Wavelength of intermediate value

Wavelength of any value

Which one of the following cannot be polarized.

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Radiowave

Ultraviolet rays

X- rays

Sound waves

The value of 'g' is maximum

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Above the earth's surface

Below the earth's surface

At the earth's surface

At the centre of earth

Radioactive decay series can be represents on

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Smith chart

Segre chart

Logarithmic chart

Carbon paper

In a projectile motion, the horizontal range depends upon.

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Initial velocity

Velocity at the highest position

angel of projection

Vertical component of velocity

An Electric kettle should always be fitted with an earth connection as a protective device What is being protected by the earth connection.

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The cable connecting the kettle

The fuse in the circuit

The heating element of the kettle

The person using the kettle

Reciprocal of the focal length is called.

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Radios of curvature of the lens

Power of the lens

Aperture of the lens

Resolving power

The force that moves a rocket or a plane forward is called.

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Lift

drag

Thrust

Turbulence

On which principle the induction coil works on.

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Self induction

Ampere's rule

Mutual induction

Gauss's law

Diffusion of gases occurs because the molecules of the

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Gas present in a higher concentration exerts a high pressure

Gases are different

Gasses attract each other

Gasses over about randomly

A 4 kJ mass of copper of specific heat capacity of 400 J kg-1k-1 is heated for 160 s by a heater of power 200 W what is the rise in temperature.

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10 K

16 K

100 K

160 K

A double convex air bubble in water will behave as.

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Plane slab

Concave mirror

Convex lens

Concave lens

Light waves can be polarized because they

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have short wavelength

Have high frequency

Can be reflected

Are transverse

Which temperature is the absolute measure of temperature.

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Thermodynamic temperature

Freezing point

Boiling point

Absolute zero

The phenomenon of interference occurs because waves obey

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Laws of reflection

Principle of super position

Laws of motion

Inverse square law of intensities

Which of the following is a transverse wave.

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Sound wave

Shock wave

Hair wave

Radiowave

Alpha particles emitted from a radioactive material are.

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He nucliei

H -nucliei

Li nucliei

B nucliei

The continuous x rays spectrum is obtained due to

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Deceleration of impact electrons

Breaking potential

Excitation potential

Ionization potential

Nuclear force exists between

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Proton proton

Neutron -neutron

neutron -proton

All of these

The half life of radium -226 is

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1620 years

45 x 10⁹ years

3.8 days

23.5 minutes

What is the number of degree of freedom of an oscillating simple gravity pendulum

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1

2

3

4

To produce beats it is necessary to use two waves.

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Travelling in opposite direction

Of slightly different frequencies

Of equal wavelengths

Of equal amplitudes

If you float in water with just your nose out the average density of your body must be

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Same as that of water

Greater than that of water

Less than that of water

Zero

Who described an ideal heat engine in 1840

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Boyle

Saadi Carnot

Kelvin

Currie

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