Question # 1

In a surface tension experiment with a capillary tube water rises up to 0.1 m. if the same experiment is repeated on an artificial satellite, which is resolving around the earth, water will rise in the capillary tube up to a height of

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0.1 m

0.2 m

0.98 m

Full length of the capillary tube

The dimensions of viscosity are:

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M²L^-1T^-2

M^-1L¹T^-1

M^-1L^-1T

ML^-1T^-1

The terminal velocity of water droplet of radius 1 x 10^-4m and desity 1000 kg m^-3descending through air of viscosity 19 x 10^-6kg. m^-1s^-1is

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2.5 ms^-1

3.2 ms^-1

4.3 ms^-1

1.1 ms^-1

If the length of the conductor is double and its cross sectional area is halved, its conductance will

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Increase four fold

Become one-fourth

Become one-half

Remains unchanged

Two dissimilar metals joined at their ends kept at constant temperature constitute:

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Cell

Voltmeter

Thermocouple

Potentiometer

None of these

Which of the following is most suitable as the core of transformer

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Soft iron

Alinco

Steel

None of these

The ratio of average e.m.f in the coil tot he time rate of change of current in the same coil is called

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Mutual induction

Mutual inductance

Capacitance

Self inductance

The SI unit of magnetic induction is tesla which is equal to

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Newton/ampere-meter or N/A-m

Newton/ampere²-meter or N/A²-m

Newton/ampere²-meter² or N/A²-m²

Newton/ampere²-meter²or N/A²-m²

Through which character we can distinguish the light waves from sound waves

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Interference

Refraction

Polarization

Reflection

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

Thermistors are prepared under

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High pressure and low temperature

High pressure and high temperature

Low pressure and low temperature

Low pressure and high temprature

None of these

Torque of a force is a vector quantity, its direction is determined by

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Right hand rule

Knowing the direction of F

Knowing the position of origin

none of these

The materials in which valence electrons are bound very tightly to their atoms and are not free, are known as

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conductors

insulators

semi-conductors

all of them

When the length and area of cross-section both are doubled, then its resistance:

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Will become half

Will remain the same

Will be doubled

Will become four times

Electrons of an isolated atom are bound to the nucleus, and?

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can only have distinct energy level

can only have same energy level

may or may not have distinct energy

none of them

A steel wire 12 mm in diameter is fastened to a log and them pulled by a tractor. The length of stire between the log and tractor is 11 m. The force of 10,000 N is required to pull the log. What is stress

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84.46 MPa

85.46 MPa

88.46 MPa

89.46 MPa

In the thin film, the path difference of two reflected ray depends upon

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Thickness of the film

Nature of the film

Angle of incidence

All of these

In the following velocity time graph,the distance traveled by the body in meters is

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200

250

300

400

A solid subjected to deformation along one dimension

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Only have tensile stress

Only have compressive stress

Have both tensile and compressive stress

None of them

The computer chips are made from

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Semiconductor

Conductor

Silicon

Sand

the equation F = ma, the mass 'm' is

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rest mass

variable mass

inertial mass

gravitational mass

Fringe spacing in YDS experiment will be maximum if we use

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Red light

Green light

Violet light

Blue light

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