Question # 1

The process in which pressure of the system remains constant.

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Isothermal process

Isochoric process

Isobaric process

Adiabatic process

In solid and liquids the variation of the speed of sound with temperature is.

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Much greater than in air

Slightly les than in air

The same as in air

Smell and usually negligible

Which type of oscillations produce resoncance.

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Free

Forced

Damped

All of these

A converging mirror with a radius of 20 cm creates a real image 30 cm from the mirror What is the object distance.

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-5.0 cm

-7.5 cm

-15 cm

-20 cm

The magnitude of resultant of three forces is 3. Its x -component is 2 and y component is 1, then its z-component will be.

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1

2

3

4

Eddy current can be minimized by

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Moving the conductor rapidly

Moving the conductor slowly

Using a metallic core

Using a laminated core

Young's double slit experiment was performed in

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1801

1916

1901

1934

When a projectile reaches the highest point the vertical component of velocity becoems.

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Small

Vi cos thetha

Zero

Maximum

Vectors are ofhen spilt into two or more orthogonal components what is true of these components.

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they are perpendicular

They are parallel

They are antiparallel

They have same magnitude

Light travels perpendicular to electric and magnetic fields and requires no material medium, was proposed by.

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Einstein

Max planck

Maxwell

Bragg

Any frequency higher than the fundamental frequency of a sound is known as.

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Overtone

Beat

Acoustics

Shockwaves

Which type of microscope was the first to be developed.

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Optical microscope

Digital microscope

Electron microscope

All were developed at the same time

A component of the spectrometer which consists of a fixed metallic tube with a coned lens at one end and an adjustable slit is called.

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Telescope

Collimator

Tumtable

Grating

The wavelength of Lyman series for hydrogen spectrum lies in the.

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Visible region

Ultraviolet region

Infrared region

Far infrared region

The path of Gama rays in Wilson cloud chamber is

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Irregular

Dense and straight

Thin and continuous

Thin and discontinuous

Which given quantity remains the same in isotones.

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Mass number

Atomic number

Number of neutrons

Number of protons

Power of the lens is one dioptre, if its focal length is.

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1/6 metre

1/2 metre

1 metre

8 metre

The power of lens in dioptres is

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Its focal length in meters

The reciprocal of its focal length in metres

The reciprocal of length in metres

The reciprocal of length in centimetres

Which quantity has different base units from the other three.

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Density x volume x velocity

Rate of change of momentum

The Young's modulus x area

Weight

A LASER beam may be used to measure very large distance because it is.

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Unidirectional

Coherent

Monochromatic

Massive

Which thermodynamic law state taht the entropy of a perfect system approaches zero.

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Zeroth law of thermodynamics

First law of thermodynamics

Second law of thermodynamics

Third law of thermodynamics

The dimensions of viscosity are

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[MLT-1]

[MT-2]

[ML-1T-1]

[ML2T-1]

Transistor are made from

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Plastics

Metals

Insulators

Doped semiconductors

What is the average K.E. of gas molecules at temperature equal to K.

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kt/3

3/2 KT

1/2 KT

2/3 KT

If the vector sum of all the torques is zero then

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1st condition is satisfied

2nd condition is satisfied

Centre of mass is lowered

Gravity becomes zero

The materials whose resistivity becomes zero below a certain temperature.

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Semi conductors

Super conductors

Insulators

conductors

The ablate of rays of different colours to converge a single point sifter refraction though a convex lens is called.

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Come

Distortion

Spherical aberration

Chromatic aberration

Which effect produce ultrasonic is quartz.

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Pyroelectric effect

Piezoelectric effect

Hall effect

Magnetostriction effect

One becquerel is equal to

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Decay of orie radioactive atoms per second

Decay of 10 radioactive atoms per secnd

Decay of 100 radioactive atoms per second

Decay of infinity radioactive atoms per second.

A capacitor of capacitance F micro is fully charged from a 20 V d.c supply what is the energy delivered by 20 V supply.

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2 mJ

10 m j

20 mJ

25 mj

For D.C. circuit the resistance can be taken as impedance with zero.

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Volt

Ampere

Phase angle

Watts

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