Question # 1

In all natural processes where heat flows from one system to another, there is always a net

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decrease in entropy

increase in entropy

decrease or increase in entropy

none of them

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

Zirconia is classified as:

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Ceramic solid

Ionic compound

Metal

Either (A) or (B)

Either (B) or (C)

Work has the dimensions as that of

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Torque

Angular momentum

Linear momentum

Power

The tidal energy is due to gravitational pull of :

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sun

moon

Mars

None of these

A high concentration of red blood cells increases its viscosity from

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3 - 5 times that of mercury

5 - 8 times that of mercury

3 - 5 times that of water

5 - 8 times that of water

A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec², then its angular velocity is rad/sec is:

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22/7

7

14

21

The process which is carried out at constant temperature is known as

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adiabatic process

isothermal process

isochoric process

none of them

Silicon can be obtained from

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Lead

Uranium

An isotope of oxygen

Sand

The wave form of SHM is

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Pulsed wave

Square wave

Triangular waved

Sine wave

Amplitude in SHM is equivalent to ______ in circular motion:

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Diameter

Radius

Circumference

None of these

The ratio of linear stress/linear strain is called

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Yong's modulus

Bulk modulus

shear modulus

modulus

Substances which undergo plastic deformation until they break are called:

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Ductile

Brittle

Malleable

Soft

Hard

Which of the following is an example of Brittle substances?

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Copper and Brass

Brass and glass

Copper and glass

Only glass

If the light travels in a straight line, the central region should appear

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Bright

Dark

No effect

None of these

Analyzer is use to

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Polarize the light

Un-polarize the light

Check whether the light is polarized or un polarized

Rotate the plane of polarized light

A particle of mass 0.5 g moving along x-axis is located at x₁= 15 m at t₁=5 s and x₂=33 m at t₂=13 s. Its average velocity is

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6 m s^-1

2.45 m s^-1

2.25 m s^-1

4.45 m s^-1

For glass-air boundary, the value of the critical angle is

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42°

45°

30°

60°

Which branch of physics deal with the structure and properties of solids

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Atomic Physics

Plasma Physics

Molecular Physics

Solid state Physics

If stress is increased beyond the elastic limit and change in solid is permanent this behaviour is called

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Elasticity

Plasticity

Conductivity

Insulator

The approximate efficiency of incandescent lamp is

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6%

8%

5%

9%

When a body is stationary

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There is no force acting on it

The force acting on it are not in contact with it

The combination of the forces acting on it balance each other

The body is in vacuum

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