Question # 1

The ratio of shearing stress/shearing strain is called as

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Modulus

Pascal modulus

Hooker's modulus

Shear modulus

1 amu is equal to.

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1.66 x 10^-24kg

1.66 x 10^-19kg

1.66 x 10^-24kg

1.66 x 10^-27kg

The product of cross-sectional area of the pipe and the fluid speed at any point along the pipe is called

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constant rate

volume rate

flow rate

steady rate

The instrument which detects the instant at which external pressure becomes equal to the systolic pressure is

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stethoscope

thermometer

manometer

barometer

When low energy photon interact with a metal,which of the following effect is likely to be taken place

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pair production

photoelectric

Compton effect

None of these

Whenever a covalent bond breaks, it creates:

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An electron

A hole

An electron-hole pair

A positron

All of these

The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is

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Much more

Very small

No amount at all

None of these

If a gymnast sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will

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Increase

Decrease

Remain constant

None of these

In metallic crystals which of the following thing remains constant

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amplitude of oscillations

temperature of solid

average atomic positions

all of them

The resistivity of a substance depends upon the

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length

mass

area

temperature

One joule is equal to

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1.6 x 10¹⁹eV

6.25 x 10¹⁸eV

1.6 x 18¹⁸eV

6.25 x 10¹⁹eV

If C_vdonotes molar specific heat at constant volume and𝜟 T is the change in temperature, then C_v𝜟T gives:

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Volume

Pressure

Energy

Entropy

Light signals in an optical fibre eventually become dim and must be regenerated by devices called

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transmitters

receivers

photodiodes

none of them

The original source of solar energy is

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Moon

Sun

Stars

Earths

When three forces acting at a point are in equilibrium then

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Each force is numerically equal to the sum of the other two

Each force is numerically greater than the sum of the other two

Each force is numerically greater than the difference of the other two

None of the above

In young s interference experiment one slit is covered with a cellophane paper which absorbs half the intensity then

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No fringes are observed

All fringes will be darks

bright fringes will be less bright and dark will be less dark

Bright fringes will be brighter and dark fringes will be darks

The wave length of x-rays is of the order of

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10^-17 m

10^-4 cm

10^-9 m

10^-10 m

The center of gravity is also called

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Centre of mass

Centre of body

Centre of force

None of these

On moving a charge of 20 coulombs by 2 cm,2J of work is done,then the potential difference between the points is

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0.1 V

8 V

3 V

0.5 V

Physical quantities having no dimensions are called

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Scalar

Numerics

Non physical Quantities

None of these

In YDS experiment, the condition for constructive interference of two coherent waves is that the path difference should be

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Integral multiple ofλ/2

Integral multiple ofλ

Even integral multiple ofλ/2

Both A and C

The derived unit of pressure is

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kg/Ns

kgm²/s²

kg/m²s²

kg/ms²

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