Question # 1

Si units of time period is

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second

hertz

revolution

vibration/sec

Swimming is based on the principle of

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Newton's 1st law

Newton's 2nd law

Newton's 3rd law

All

The domains are of macroscopic size of the order of

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centimeters

meters

millimeters

nanomneters

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

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P=P/V<1/2mv²>

P=2N/V<1/2mv²>

P=2/3N/V<1/2mv²>

P=2/3N/V<mv²>

Which of the following is/are example/s if mechanical waves i.e. waves generated in _______:

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Rope

Coil of spring

Water

All of them

Which of the following medium/media can transmit both transverse and longitudinal waves:

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Solids

Liquids

Gases

All of them

The phase at the positive peak of an A.C. cycle is:

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0º

90º

180º

0 andᏘ

Ꮨ/2 and 3Ꮨ/2

When small number of atoms from some other suitable element is added to the semi-conductor material, then this process is known as

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impurification

adding

doping

extrinsivity

An isochoric process is one which take place at

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Constant internal energy

Constant entropy

Constant volume

Constant pressure

Radiation detector are used to

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measure intensity of radiation

measure energy of radiation

difference between different types of radiation

all the above

A simple pendulum consists of a

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small light bob

small heavy bob

big light bob

big heavy bob

Average KE of a gas molecule has:

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Direct relation with absolute temperature and inverse relation with pressure

Direction relation with both absolute temperature and pressure

Inverse relation with both absolute temperature and pressure

None of these

If F=0.04 N and X=4 cm then K=

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1 Nm^-1

2 Nm^-1

3 Nm^-1

4 Nm^-1

Sadi carnot described an ideal heat engine in

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1820

1840

1860

1880

In the phenomenon of hysteresis

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magnetism leads the magnetising current

magnetism lags behind the magnetising current

meganetism goes along the magnetising current

none of them

The time interval during which the Voltage source changes its polarity once is known as:

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Time period T

Half the time period

Quarter the time period

Two third of the time period

None of these

SI unit of frequency is

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second

hertz

revolution

vibrations/sec

Split rings act as

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Vibrator

Resistor

Motor

Commulator

Energy gas behaves like an ideal gast at

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High temperature and low pressure

Low temperature and high pressure

Both A and B

None

The nature of capacity of electrostatic capacitor depends on

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Shape

Size

Thickness of plates

Area

Charge on proton is

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1.59 x 10^-9C

1.59 x 10^-7C

-1.59 x 10^-19C

1.59 x 10^-19C

The relation V = IR represents

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Ampere law

Faraday's law

Ohm's law

Len's law

Which one of the following waves belongs to electromagnetic spectrum

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Radio and TV waves

Radar waves

Micro waves

All of them

The solids which has structure in-between order and disorder are called

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amorphous solids

polymeric solids

crystalline solids

all of them

The decrease in velocity per unit time is called

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deceleration

acceleration

uniform acceleration

variable acceleration

The value of electrical constant of proportionality k is

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9 x 10⁹Nm²C^-2

9 x 10^-9Nm²C^-2

9 x 10¹⁰Nm²C²

9.85 x 10^-12N^-1C^-2

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

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Increases

Decreases

Remain unchanged

Becomes infinite

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

When a water droplet falls through air, the net force on it is

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Net force = drag force - weight

Net force = weight - drag force

Net force = drag force + weight

Net force = weight + drag force

Michael Faraday and Joseph Henry belong respectively to

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USA and England

England and France

England and USA

USA and France

None of these

Blood has a density

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Equal to water

Greater then water

Lesser then water

None of these

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