Question # 1

The photons emitted in inner shell transition are.

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Alpha particle

Beta particle

Gama particle

Characteristic X-rays

Marie Curie and Pierre Curie discovered two new radioactive elements which are.

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Uranium and radkum

Platinum and radium

Polonium and radium

Crypton and radon

The SI unit of spring constant is identical with that of.

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Force

Pressure

Surface tension

Loudness

Two lenses of focal length 'f' are combined the resultant focal length is

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f

2f

f/2

zero

Planets move around the sun due to.

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Centrifugal force

Centripetal force

Gravitational pull between them

Frictional force between them

The spacing of electric field lines between two identical point charges of opposite signs

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Is not indication of the field direction

Is not dependent on the magnitude of the charges

Is an indication of the field strength

Is large when the charges are very large

The process is which volume of the system remains constant.

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Isobaric process

Isochoric process

Isothermal process

Adiatatic process

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

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0^o

45 ^o

80 o

180^o

Which of the following pair is correct.

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Rutherford - x-rays

Roentgen - Electron

Chadwick - Neutron

J.J. Thomson -Photon

If a wave vibrate 10 times in 1 s with a speed of 10 m s-1 the correct wavelength of the wave is.

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1 m

10 m

20 m

100 m

The nucleus of tritium is called.

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Proton

Triton

Deuleron

Positron

The field in which the work done is independent of the path followed.

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Conservative field

Electric field

Magnetic field

Non conservative field

In an induction coil, the secondary emf is.

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Zero at the break of the circuit

Zero during make of the circuit

Very high during make of the circuit.

Very high during break of the circuit

Which of the following is a non contacting device that intercepts and measures thermal radiation.

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Thermometer

Pyrometer

Voltmeter

Lactometer

Which one fo the following is based on the diffraction and repulsion of electric charge.

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Capacitor motor

Transformer

Induction motor

synchronous motor

An Alpha particle is the same as

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A helium nucleus

A high speed electron

A hydrogen nucleus

Electromagnetic radiation of short wavelength

In a purely resistive circuit carrying A.C. current the.

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Current and voltage are always in phase

Current lags the voltage by 1/4 cycle

Voltage lags the current by 1/4 cycle

Current leads the voltage by 1/2 cycle

A sheet of transparent material with fine equality spaced lines ruled parallel on its surface is called.

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Interferometer

Grating element

ruler

Patch

Net change in entropy of a system in a Carnot's cycle in

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Positive

Negative

Zero

Infinite

If an object moves with velocity of light the apparent mass of the object as compared to list original mass is

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greater

Smaller

Same

zero

Conductance is the reciprocal of.

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Capacitance

Inductance

Resistance

Admittance

In Compton's effect the change in wavelength of a scattered photon is called.

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Angle of emergence

Angle of refraction

Angle of deviation

Compton shift

The wavelength of X-rays is of the ofder of.

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10^-14 m

10^-10 m

10^-9 m

10^-6 m

If a single convex lens is placed closed to the eye then it can be used as

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Telescope

Simple microscope

Compound microscope

Opera glass

Which of the following is an example band spectra.

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Black body radiation spectrum

Atomic spectra

Molecular spectra

Anomalous spectrum

Which of the following SI units is not named after any physicist.

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Hertz

Joule

Volt

Candala

If a di electric is placed between the plates of a capacitor, its capacitance.

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Decreases

Increases

Remains unaffected

Is zero

If a charged body is moved against the electric field it will gain.

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P.E

K.E.

Electrical P.E.

Gravitational energy

Two convex lens focal length 'f' use din combination become telescope. When the distance between them is.

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1

4f

2f

f/2

Fluid mechanics is the study of how fluid move and the other ting involved is

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Energy

Velocity

Forces

Position

X-rays are a part of electromagnetic spectrum and are characterized by frequencies higher that those of.

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Infrared radiation

Ultraviolet radiation

Far ultraviolet radiation

Far infrared radiation

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