Question # 1

The unit of magnetic induction is.

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weber -metre

weber -metre 2

weber-meter-2

weber-metre-1

In a magnifying glass, the objective is placed at a distance

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Less than the focal

Between the focal length and twice the focal length

Greater than twice the focal length

At the focus of the lens

Beta decay may occur by

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Beta minus

Beta Plus

Electron capture

All of these

Which of the following is an example band spectra.

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Black body radiation spectrum

Atomic spectra

Molecular spectra

Anomalous spectrum

What will be excitation energy in the third orbit of hydrogen atom.

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0.66 eV

0.85 eV

1.5 eV

5.4 eV

The simple form of particle accelerator is.

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Cathode ray tube

Oscillator

_Amplifier

Phase locked loop

The nib of fountain pan is split of convey ink down the nib by the phenomenon of.

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Adhesion

Cohesion

Osmosis

Capillary

A piece of weighed wood just floats in water when placed in alcohol will

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Float lower

Float higher

Stay as before

Sink

When two identical travelling waves are superposed, velocity of the resultant wave

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Remains unchanged

Decreases

Increases

Become zero

In a galvanometer the enameled copper wire is wound on.

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An insulator

A non magnetic material

A magnetic material

A conductor

Which effect produce ultrasonic is quartz.

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Pyroelectric effect

Piezoelectric effect

Hall effect

Magnetostriction effect

Which of the following is a clinical thermometer.

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Gas thermometer

Mercury thermometer

Alcohol thermometer

Radiation thermometer

Convention is the transfer of thermal energy by means of currents in

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Pressure

Temperature

Liquids

Fluids

The electrons behave as wave because.

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They can be diffracted by a crystal

They can be defecting by magnetic field

They can be deflecting by electric field

they can produce ions in gases

Which of the following scientists is known for his exceptional work in the field of optics.

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Albert Einstein

Issac Newton

Ibn al Haithem

Alberuni

Woolen clothing a effective in keeping us warm because.

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An trapped int he wool acts as an insulator

Heat loss by convection and radiation is prevented

Wool is bad traciator and good absorber of heat

Wool can retain high temperatures

If we use two diodes and a centre tapped transformer we eill get

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Transistor

Amplifier

Half wave rectifier

Full wave rectifier

A force of 100 N acts on body of mass 5 kg for 10 s. The velocity of the body will be.

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2 ms -1

20 m s-1

200 ms-1

2.000 m s-1

Which electrical quantity has the same units as electromotive force.

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Charge

Current

Potential difference

Power

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

The resultant magnitude of two vectors

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Is always positive

Can never be zero

Can be negative positive or zero

Is usually zero

The dimensions of work are

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[MLT-2]

[ML2T-2]

[ML2T-1]

[MLT-1]

The magnifying power of a convex lens of focal length 5 cm is

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3

5

6

20

Planets move around the sun due to.

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Centrifugal force

Centripetal force

Gravitational pull between them

Frictional force between them

Sounds of frequencies higher than 20,000 Hz are called.

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Super sonics

Infrasonic

Ultrasounds

Audible sound waves

The velocity of sound will be greater in.

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Air

Water

Solids

Vacuum

An A.C. dynamo operates on the principle of

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Mutual induction

Self induction

Electromagnetic induction

Mechanical induction

operation of a LASER depends upon

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Spontaneous emission of radiation

The existence emission of radiation

The existence of atoms in normal state

The existence of atoms in metastable state

When Be is bombarded by alpha particles, then we obtain

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electron

Proton

Positron

Neutron

Which of the following has the highest relative biological effectiveness or the quality factor.

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X rays and Gama rays

Electrons

Photons

Alpha particles

A current carrying loop lying-in a magnetic field behaves lime a.

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Magnetics pole

Magnetic material

Magnetic dipole

Horse shoe magnet

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