Question # 1

While deriving the equation for pressure of a gas we consider the

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rotational motion of molecules

vibrational motion of molecules

linear motion of molecules

all of them

Which one is not produced by sound waves in air?

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Polarization

Diffraction

Refraction

Reflection

For the conversion of galvanometer into voltmeter, we connect a

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small resistance in series with galvanometer

small resistance in parallel with galvanometer

high resistance in parallel with galvanometer

high resistance series with galvanometer

The capacity of a parallel plat capacitor depends on the

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Type to metal used

Thickness of plates

Potential applied across the plates

Separation between the plates

Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in

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1890

1895

1900

1905

The angle of deflection of coil can be measured by the

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one method

three method

two method

none of these

Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at

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subsonic speed

sonic speed

super sonic speed

any one of them

Swimming becomes possible because of______law of motion.

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First

Second

Third

None of these

A signal is amplified at the output without any change of phase, if it is applied at the

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inverting input

non-inverting input

at any of the input

none of these

U-238 present in the natural uranium is about:

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59%

0.007%

99%

39%

19%

Binding energy per nucleus is

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greater for heavy nucleus

least for heavy nucleus

greatest for light nuclei

decreases for medium weight niclei

Ball pen functions on the principle of

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Viscosity

Boyle's law

Gravitational force

Surface tnesion

If the instantaneous velocity of a body does not change. the body is said to be moving with

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average velocity

uniform velocity

instantaneous velocity

variable velocity

A physical system under going forced vibrations is known as

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Simple harmonic oscillator

Compound harmonic oscillator

Physical harmonic oscillator

driven harmonic oscillator

Resistance of a conductor is increased, the currant will

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Decrease

Increase

Remain the same

None of these

The values 1 and 0 are designated as:

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Continuous values

Binary values

Boolean values

Decimal values

Either (B) and (C)

Resistor is a device which convert electric energy to

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Heat energy

Chemical energy

Elastic energy

All of the above

The alternative voltage of current is actually measured by:

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Its RMS value

Square root of its mean square value

Instantaneous value

Peak value

Both (A) and (B)

Compton was awarded Nobel prize in physics in

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1921

1923

1925

1927

The resonance will be sharp, if the amplitude decreases rapidly at a frequency

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equal to the resonant frequency

slight different from the resonant frequency

greatly different from the resonant frequency

any one of them

An alpha particle has a charge of

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+2e

-2e

-e

+3e

Which one of the following elasticizes is possessed by fluids:

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Young's elastic modulus (length)

Bulk elastic modulus (volume)

Modulus of rigidity (shape)

None of these

The effect of applying a force on a moving body is to change

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its direction of motion only

its speed of motion only

both the direction and speed of motion

its inertia only

If electric and gravitational force on an electron in a uniform electric field will be

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E=mg/q

E=q/mg

E=,g/q

E=qg/m

The counter, which also provides the power to the G.M. tube is called:

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Thin mica window

thin glass window

Airy window

Wooden window

None of these

The chemical behaviour of an atom is determined by

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binding energy

atomic number

mass number

number of isotopes

The unit of work function is:

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Joule

Electron volt

That of threshold frequency

Both (A) and (B)

None of these

The shortest distance between two points directed from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

Fire fighters have jet attached to the head of their water pipes in order to

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Increase the mass of water flowing per second

Increase the velocity of water flowing out

Increase the volume of water flowing per second

Avoid wastage of water

Carnot heat engine only used

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isothermal processes

adiabatic processes

both of them

none of them

Fire fighters have a jet attached to the head of their water pipes in order to head of their water pipes in order to

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Increase the mass of water flowing per second

Avoid wastage of water

Increase the velocity of water flowing out

Increase the volume of water flowing per second

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