Question # 1

The Rutherford atom according to classical theory is

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Stable

Unstable

Partially stable

Quantized

For how long the sensation of sound persists in our brain.

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0.1 s

0.2 s

0.3 s

0.4 s

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

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Conduction

Convection

Radiation

None of these

An AND gate is.

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Equivalent to a series switching circuit.

Equivalent to a parallel switching circuit

Equivalent ot universal gate

A reciprocal of NAND gate

A force of 50 N acts on a body for 10 s the change in momentum will be.

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5 N s

200 Ns

500 Ns

800 N s

Which of the following is an example band spectra.

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Black body radiation spectrum

Atomic spectra

Molecular spectra

Anomalous spectrum

The phenomenon of interference comes about because waves obey

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the impulse momentum theorem

An inverse square law of intensity

The principle of reciprocity

The principle of super position

When transistor works as an amplifier, its output is.

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More

Less

Zero

Directly proportional to the input

The specific heat capacity of the body depends upon.

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the heat given to it

Mass of the body

Temperature raised

Material of the body

X-rays used for

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Cutting boring and precision welding

Retina stitching in eye operations

Detecting heavy elements under the earth

Deflecting flaws in welding and casting

Who described an ideal heat engine in 1840

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Boyle

Saadi Carnot

Kelvin

Currie

A body of mass 2 kg is suspended in a elevator by means of a spring The balance reads its weight when the elevator moves up with an acceleration of 5 m s-2 as.

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9.8 N

29. 6 N

26.5 N

30.5 N

The total energy of an electron in an orbit around the nucleus is.

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Zero

Unity

Infinity

Negative

A gama ray of energy 1900 MeV is absorbed by

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Proton antiproton pair

Electron positron pair

Producing heat in the substance

The orbit

The potential due to which an electron is lifted from gerund state to excited state is.

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Potential gradient

excitation potential

Ionization potential

Potential difference

Which kind of motion is exhibited by molecules of monoatomic gas.

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Rotatory

Vibratory

Translatory

Random

The behavior of the gases that can be easily liquefied is like that of the.

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Triatomic gases

Ideal gases

Van der walls gases

Dia atomic gases

Faraday's law was deduced in

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1826

1831

1836

1841

The unit of intensity level is.

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Watt

Joule

Bel

Sabin

The unit of energy are the same as that of

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Force

Power

Work

Efficiency

The transfer of thermal energy between regions of matter due to a temperature gradient is called.

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Conduction

Radiation

Convection

Sublimation

Negative feedback

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Increases stability

Decreases stability

Produces oscillatory

Cannot occur

An other name for electric P.E per unit charge is.

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Electric intensity

Electric field

Electric potential

Electric force

The distribution of electrical charge i an object caused by teh influence of nearby charges is called.

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Electric potential

Electrostatic induction

Electric flux

Electric dipole moment

The back ground radiation in the atmosphere on the average is

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0.5 Sv per year

1.0 Sv per year

1.5 Sv per year

2.0 Sv per year

The half life of uranium -238 is

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1620 years

4.5 x 10⁹years

3-8 days

23.5 minutes

Lenses are commonly made of.

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Glass only

Plastic only

Glass and clear plastic

Aluminium

Where is the velocity of electrons maximum in a diode.

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Near the cathode

Near the anode

In the space ini between the two elecrode.

It is same throughout the tube

On loading the prong of a tuning fork with wax. Its frequency.

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Increases

Decreases

Remain unchanged

May increase or decrease

A factory buy 100 g of a radioactive chemical with a half life of 5 years which decays to a stable compound How much of the chemical will still be radioactive 10 years time.

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25 g

50 g

75 g

100 g

The angle of scattering for which the Compton shift is maximum is.

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0^o

45 ^o

80 o

180^o

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