Question # 1

Newton's law of motion do not hold in

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an accelerated frame of reference

an unaccelerated frame of reference

both of these

none of these

The pattern of NaCl particles have a shape which is :

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Cubic

Body centred cubic

Simple cubic

face centred

Both (A) and (C)

Which of the following is a characteristic of an ideal fluid?

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it is non-viscous

it is incompressible

it's motion is steady

all of the above

The neighbours of every molecule in crystalline solids are arranged in

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an irregular manner

a regular manner

any manner

none of them

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 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)

Zirconia is classified as:

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Ceramic solid

Ionic compound

Metal

Either (A) or (B)

Either (B) or (C)

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

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One joule

One erg

One electron volt

None of these

There is no net transfer of energy by particle of medium in

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Longitudinal wave

Transverse wave

Progressive wave

Stationary wave

In the reverse process, the working substance passes through the same stages as in the direct process and

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thermal effects at each stage are exactly reversed

mechanical effects at each stage are exactly reversed

thermal and mechanical effects at each stage remain the same

thermal and mechanical effects at each stage are exactly reversed

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

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49 rad/sec²

1 rad/sec²

0.16 rev/sec²

Both A and C

Both B and C

A force of 10N is required to move a body with a velocity 10 ms^-1the power developed is

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10 W

50 W

100 W

1000 W

In an inelastic collision

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Both K.E and momentum are conserved

Both K.E and momentum are not conserved

Momentum is conserved and K.E is not conserved

K.E is conserved and momentum is not conserved

Steel is preferred for making springs over copper.Whey?

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Steel is cheaper

Young;s modulus of steel is more than that of copper

Young's modulus of copper is more than that of steel

Steel is less likely to be oxidized.

The SI unit of stress is same as that of.

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Momentum

Pressure

Force

Length

Arsenic antimony or phosphorus are impurities of

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p-type

n-type

May be p-type or n-type

None of these

The nature of thermal radiation is smaller to:

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Ultraviolet rays

Light rays

Both of them

None of these

A glass plate on which a large number of very fine equidistant parallel lines are drawn is called

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convex lens

thin film

diffraction grating

interferometer

In a full wave rectifier with input frequency 50Hz. The frequency of pulsating D)C) received as an output across the load is

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50 Hz

100 Hz

500 Hz

zero

Area between the velocity time graph and time axis is equal to

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Speed of object

Distance covered

Velocity of the object

Acceleration

Reflection of light from water, glass, snow and rough road surfaces, for larger angle of incidences, produces

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images

bright images

interference

glare

A special alloy called Alnico is known as

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Soft magnetic material

Hard magnetic material

In between soft and hand magnetic material

None of these

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