Question # 1

An intertial frame of reference is a frame of reference which is

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at rest

moving with uniform velocity

either at rest or moving with uniform velocity

none of these

The mechanics, which deals with the objects moving with velocities approaching that of light is called:

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Relativistic mechanics

Wave mechanic

Quantum mechanics

Statics

The natural arrangement of colours in the spectrum of white light spectrum is

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VIBGYOR

ROYBGIV

ROYBIGV

BIGROYV

None of these

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

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10Ω

20Ω

30Ω

40Ω

When sound waves travel from air to water which of these remains constant?

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Velocity

Frequency

Wavelength

All the above

The square of 0.4 is:

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Greater than 0.4

Smaller than 0.4

Equal to 0.4

None of them

Escape velocity from surface of Moon as compared to that from Earth surface is:

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Greater

Smaller

Equal

None of thes

When a mass attached to a spring begins to move left or right from the equilibrium position, its P.E.:

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Increases

Decreases

Remains constant

None of these

In the same medium, velocity of the wave:

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Goes on increasing

Remains constant

Goes on decreasing

None of these

The force which opposes the applied force producing the displacement in the spring is called

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restoring force

periodic force

centripetal force

resistive force

The damping depends upon the

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amplitude

sharpness

both of them

none of them

The unit of thermodynamics scale is

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C°

K

F°

All of these

Aquifier is a layer of rock holding water that allows water to percolate through it with

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Temperature

Pressure

Steams

None of these

The total linear momentum of an isolated system remains

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Constant

Variable

Zero

None of these

For a point source of light the wave front produced are

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Circular

Spherical

Cylinrical

None

The greatest stress that a material can endure without losing the proportionality between stress and strain is called

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Plasticity

Breaking point

Proportional limit

Strain

The value of shear modulus is zero for:

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Water

Mercury

Diamond

Both (A) and (B)

Both (A) and (C)

The rater of flow is measure in

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Liter-sec

Liter/sec

Liter/sec²

Sec/liter

In old age, arteries carrying blood in the human body become narrow resulting in an increase in the blood pressure. This follows from

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Pascal's law

Stoke's law

Bernoulli's principle

Archimedes principle

When a shell explodes in mid-air, its fragments fly off in

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One direction

Opposite direction

Different direction

None of these

A semi conductor in its extremely pure from is known as

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extrinsic semi-conductor

intrinsic semi-conductor

either of them

none of them

_____________ suggested the basic formula of fractional force F is liquid

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Maxwell

Newton

Plank

Stoke

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