Question # 1

Density of water is:

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100 kgm^-3

1000 kgm^-3

10 kgm^-3

1 kgm^-3

P.E is equal to:

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mgh

1/2 mv²

W x F

None of these

1 N ___________

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1 kgms^-2

1 kg ms^-1

ms^-2

All

A Leslie cube is a:

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Metal box

Wooden box

Glass box

None

Land and Sea breezes are the results of:

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Conduction

Convection

Radiation

Conduction and Radiation

The quantity of heat absorbed by the body depends upon:

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Colour of surface

Nature of surface

Shape of surface

Both a & b

if force on body on y-axis is 100N than x-axis is:

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1000 N

200 N

600 N

0 N

Dull black surface are good ____________

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Absorber

Radiator

Conductor

None of these

Perpendicular / hypotenuse is equal to:

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Cosθ

Tanθ

Cosecθ

Sinθ

Metals are good conductor of heat due to:

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Free electrons

Reamain same

Small size of their molecules

Rapid vibration of their atoms

Resultant vector can be found by:

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θ=tan^-1 Fy/ Fx

θ=tan[Fy/ Fx ]

θ=tan^-1[ Fy/ Fj ]

None of these

The index of refraction depends on:

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The focal length

The speed of light

The image distance

The object distance

The end of solenoid from which lines of force emerge out is called:

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North pole

South pole

North and south pole

None of these

The distance between two consecutive waves compressions or rarefactions is called:

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Focal length

Wave length

Frequency

Time period

The number of wavelength of waves passing through a point in one secnd is called:

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Time period

Cycle

Frequency

None of these

F=

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qE

q-E

q/E

q+E

If 2 joules of energy is required to transfer one coulomb of charge from one point to another, the potential difference between these points will be:

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1V

2V

4V

6V

If one of the resistors in a parallel circuit is removed, the total resistance will be:

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Doubled

Decreased

Increased

Remain same

Which device has two coils, primary and secondary?

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D.C. Motor

Transformer

A.C. genrator

a and b

The direction of induced e.m.f. in a circuit is in accordance with conservation of.

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Mass

Charge

Momentum

Energy

The symbol of alpha particles is:

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4AHe

42He

0-1B

00Y

The amount of current that can be felt is:

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1A

0.1A

0.001 A

2A

For maximum range the angle of projection must be

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30^o

45^o

60^o

90^o

Bio mass is converted into fuel by

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Evaporation

Fermentation

Reflection

Scattering

If the pressure of a gas is doubled, then speed of sound is.

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Doubled

Become half

Not affected

Increases by four times

A stationary waves is established din a string which vibrates in four segments at a frequency of 120 Hz, Its fundamental frequency is.

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15 Hz

30 HZ

60 Hz

480 Hz

Usually the x-axis is taken as

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Vertical axis

Horizontal axis

+ve axis

-ve axis

Direction of a vector in space requires

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Two axis

Three axis

Four axis

Both a and b

Food rich in proteins is:

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potato

grapes

vegetables

bread

The motion of a body moving along a circular path is called.

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Translational motion

Angular motion

Vibratory motion

Linear motion

Original source of energy for biomass is

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Earth

Star

Moon

Sun

Light waves are

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Longtail waves

Transvers waves

Stationary waves

Mechanical wave

When sound waves enter in different medium, the quantity that remains unchanged is.

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Intensity

Speed

Frequency

Wave length

Photo copier and inkjet printer are the applications of

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Magnetism

Electricity

`.Electro magnetism

Electrostatics

Useful device to measure resistance, current and voltage is an electronic instrument called.

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Volt meter

Ammeter

Ohmmeter

Digital Multimeter

Two metallic sphere of radius 2 cm and 4 cm get equal quantity of charge. Which has greater surface charge density ?

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2^nd sphere

Both have same

First sphere

None of these

GM counter uses

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Alcohol only

Bromine

argon

Neon and bromine

The unit of permiability of free space is:

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T.m/A

T.m²/A

T.m/A²

None of these

Internal frame is a frame is which

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1st law holds

2nd law holds

3rd law holds

Kelvin's law holds

A proton consists of quarks which are.

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Two up, one down

One up, two down

All up

All down

When the back emf in a current is zero, it draws

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Zero current

Maximum current

Minimum current

Steady average current

Which one of the following is polymeric solids

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Glass

Nylon

Copper

Zinc

The critical temperature of mercury is.

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1.18 K

4.2 K

3.72 K

7.2 K

A solid in which there is not regular arrangement of molecules is called.

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Glassy solid

Amorphous solid

Crystalline solid

Both a and b