Question # 1

Which term given below refers to the concept moving clocks run slower than clocks at rest w.r.t an observer.

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Simultaneously

Mass variation

time dilation

Length contraction

In a n-type material there is an excess of.

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Free electrons

Holes

Quarks

Measons

The horizontal range is equal for the angles.

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30 ^o and 45 ^o

30 ^oand 60 ^o

45 ^o and 90 ^o

60 ^oand 75 ^o

Restoring force in SHM is.

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Centripetal

Frictional

Conservative

Non conservative

Which of the following is its own anti particle.

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Photon

Electron

Proton

positron

Which of the following factors determines the resolving power of an instrument.

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magnification

Total length of objective

Diameter of objective

Refractive index of objective

Beats are the result of.

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Interference

Doppler's effect

Ultrasound

Polarization

Electromagnetic waves transmit.

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Energy only

Momentum only

Energy and momentum

Light

How much large is the proton mass than the electron mass.

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1536

1636

1736

1836

Who introduced the concept that an atom posses quantized energy levels.

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Raman

Bohr

Newton

Fermi

The light rays which combine destructively would mean that resultant

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Intensity increases

Intensity decreases

Amplitude increases

Amplitude decreases

Which of the following is a non conservative force.

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Gravitational force

Air resistance

Elastic force

Tension in a string

Which law states that the angle of incidence equals the angle of refraction.

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Law of reflection

Law of refraction

Snell's law

Hygens's principle

A fringe is a path of.

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Constant amplitude

Constant phase

Same wavelength

Constant frequency

When using the formula E = h lambda what unit should energy have.

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Joule

Watt second

Newton metre

Electron volt

The cause of ferromagnetism is.

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Orbital motion of elections

spin Motion of electrons

Permanent dipole memento

Spin angular momentum

Which of the following defines P.E. per unit charge.

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Electric current

Charges

Potential

Electric field

The sound waves used sonography are

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Less than 20 KHz

of 20 Khz

Greater than 20 KHz

Of 20 MHz

Thermal conduction in metals differs from thermal conduction in insulators,. The reasons for this is that , in metals heat can be transported by.

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Electrons

Lattice vibrations

Photons

Positive ions

For a prism of particular and given wavelength the resolving power varies as

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First power of lens of its base

Square of inverse length of its base

Increases of length of its base

Cube of the length of its base

Which of the following is an example of diamagnetic substances.

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Nickel

Chromium

Antimony

Cobalt

The capacitance of a capacitor increases with a decreases in.

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Plate area

Permitivity

Plate separation

Dielectric constant

When ever current is drawn from a cell Its terminal potential difference and emf become

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Different

Same

Zero

Negative

Due to which phenomenon, diamond shrines so brightly.

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Scattering of light

Refraction of light

Dispersion of light

Total internal reflection

The viscosity of an ideal fluid is

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Infinity

Unity

Zero

0.5

The building up of electric charge on the surface of objects is termed as.

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Static electricity

Electric charge

Electric current

Electrostatic induction

In the experiment of force on a current carrying conductor in a uniform magnetic field the magnitude of force depends upon which factor.

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Force is inversely proportional to current

Force is directly proportional to current

Force is inversely proportional to voltage

Force is directly proportional to voltage

The number of electrons in U nucleus are.

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92

235

zero

143

The SI unit of density is.

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kg m2

kg m-2

kg m-3

kg m2 s-2

The escape velocity

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Is independent of mas of the body

Increases with the increases of mass of the body

Decreases with the decreases of mass of the body

Depends upon the type of body used

Which characteristics successively increases in the musical scale.

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Pitch

Quality

Loudness

Amplitude

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