Question # 1

Surface tension of water is due to

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Inter molecular attractions

Inter molecular spaces

Inter molecular repulsion

None of above

The weight 'mg' of the bob is resolved into

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one component

two components

three components

four components

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

According to Einstein, with the great increase in the speed of the body, the relativistic mass of the body

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Remains constant

Decreases

Increases to infinity

Reduced to zero

In a cubic crystal, All solids meet at:

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60^o

90^o

109^o

30^o

10^o

The most common source of alternating voltage is:

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Motor

Transformer

AC genrator

Both (A) and (C)

Both (A) and (B)

When heat is removed from the system

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negative

positive

zero

any one of them

1 gm-cm^-3is equal to:

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10³kg-m^-3

10^-3kg-m^-3

1 kg-m^-3

10⁶kg-m^-1

An alpha particle is accelerated through a potential difference of 10⁶volt. Its kinetic energy will be

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1 MeV

2 MeV

4 MeV

8 MeV

There are some whose resistivity becomes zero below a certain temperature, called

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absolute zero

0°C

critical temperature

lower fixed point

Which one is the least multiple

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Pico

Femto

Nano

Atto

At the maximum height the V_f is

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_Constant

Zero

Maximum

None of these

Drag force on a falling ball depends upon

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Size of the body

Shape of the body

Orientation of the body

All of these

How many wave lengths of Kr⁸⁶ are contained in one meter

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1553164.13

652189.63

2347127.23

1650763.73

The young s modulus for a perfectly rigid body is

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Zero

1

Infinite

None of these

In young's double slit experiment the separation between the slit is halved and distance between the slit and screen is doubled.The fringe width is

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Unchanged

Halved

Doubled

Quadrupled

The process of liquefaction and evaporation of a substance performed slowly are

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Reversible

Practically reversible

Not reversible

None of these

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

A test charge q is the charge which is

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Very small

Very strong

A point charge

All of them

By dimensional analysis, we can find

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Correctness of formula

Derivation of formula

Physical nature

All of these

When interference of light takes place

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Energy is created in the region of maximum intensity

Energy is destroyed in region of maximum intensity

Conservation of energy hold goods and energy is redistributed

Conservation of energy does not hold good

Breaking load for units area of cross-section of a wire is called:

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Tensile strength

Ductibility

Yield point

Breaking stress

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