Question # 1

Angular simple harmonic motion is.

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Periodic rectilinear motion

Independent of any applied torque

Periodic rotational motion

Never defined

Conventionally antilock wise torque is taken as.

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Zero

Positive

Infinity

Negative

The convincing evidence of the wave nature of electrons was provide by.

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Stefan

Rayleigh

Davision and Germer

Balmer

Absolute P.E. of a body can be calculated

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At centre of the earth

Below centre of the earth

From surface of the earth

Below surface of the earth

A Carnot engine has the same efficiency between (i) 100 K and 500 K and ii) T and 900 K What will be T.

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90 K

100 K

180 K

200 K

The value of voltage or current that exists in a circuit at any instant of time measured from some reference point is its.

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Peak value

Peak to peak value

Instantaneous value

Average value

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

The shape of wave front depends on

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Density of medium

Shape of medium

Viscosity of medium

Length of medium

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

Which are the following describe the study of static magnetic fields.

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Electrodynamics

Megnetostatic

Electrostatic

Paraamagnetism

Crystalline solids are of.

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Short range order

Long range order

Intermediate range

Plastics

The simple form of particle accelerator is.

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Cathode ray tube

Oscillator

_Amplifier

Phase locked loop

The coulomb's law is valid for the charges which are.

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Moving and point charges

Moving and non point charges

Stationary and point charges

Stationary and large size charges

The photons emitted in inner shell transition are.

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Alpha particle

Beta particle

Gama particle

Characteristic X-rays

Ohm's law is applicable to

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Ohmic and non ohmic devices only

Semiconductors only

Metals only

Insulators only

A p-type material is formed then a semiconductor is doped with

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Trivalent impurity

Tetravalent impurity

All of above

A material having excess of free electrons

Atomic reactor is based on

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Controlled chain reaction

Uncontrolledly chain reaction

Nuclear fission

Nuclear fusion

If the resultant of two forces, each of magnitude F have the magnitude F, angle between the forces will be.

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30^o

80^o

90 ^o

120 ^o

A spring of force constant k is out into three equal pats. The force constant of earth part will b e.

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k

3 k

k/3

k/2

The number of molecules or atoms in a specific volume of a gas is independent of their

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Volume

Pressure

Size

Temperature

The phenomenon of Brownian motion shows that

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Molecules exist and can be seen as bright dots moving about

Molecules moves about randomly at highs speeds

Smoke particles behaves as molecules

Smoke particles can be used as models of air molecues.

An operational amplifier can be used as a

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Comparator

Night switch

Inverting and non inverting amplifier

All of the above

The first super conductor was discovered by

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Faraday

Lenz

Kamaerlingh Ornes

Oersted

The angular frequency time period and frequency in SHM not depend upon.

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Mass

Force constant

Amplitude

Restoring force

When the source and observer are moving away from each other the apparent pitch will

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Increases

Decreases

Be zero

Be infinite

Which particle has zero charge and zero rest mass.

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Neutron

Proton

Electron

Photon

Hearing damage is possible at sound pressure of

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0 dB

50 dB

130 dB

195 dB

The main causes of power losses in a generator are.

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Pulsatng current

Eddy current

Magnetic current

Both B and C

What is shapes of a pure note

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Sinwave

Sawtooth

Square wave

Triangular wave

Radioactive decay series can be represents on

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Smith chart

Segre chart

Logarithmic chart

Carbon paper

If a liquid does not wet a solid surface, the angle of contact is.

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Less than 90^o

Greeter than 180 ^o

90 ^o

Between 90 ^o and 180^o

Natural radioactivity was discovered in.

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1978

1896

1904

1906

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