Question # 1

The force acting on unit area at surface of a body is called:

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Strain

Elasticity

Force

Stress

A Leslie cube is use to identify :

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Radiation

Conduction

Convection

Both A and B

In ___________ (CFC) was found reacting with ozone.

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1920s

1970s

1950s

1960s

A temperature rise in the environment disturbs life called:

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Air pollution

Land pollution

Noice pollution

Thermal pollution

Anything that rotates around a planet is called:

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Star

Sun

Moon

Satellite

Which process produced cooling effect?

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boiling

freezing

condensation

evaporation

Transfer of heat by the actual movement of molecules from one place to the other is called

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conduction

convection

radiation

waves

__________ forces have opposite direction:

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Unlike parallel

Parallel

Like parallel

None of these

The speed geostationary satellite with respect to earth is:

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8.33 kms^-1

3.87 ms^-1

32 ms^-1

Zero

The value of g at a height one Earth's radius above the surface of the earth is:

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2g

1/2 g

1/3 g

1/4 g

The value of 'g' is greater at:

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Moon

Hills

Sea leavel

Desert

Transformer works on _______ supply.

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A.C

D.C

Battery

Both A and B

Capacitors are mainly used for radio frequency tuning:

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Paper capacitor

Air capacitor

Mica capacitor

Electrolytic capacitor

Current is equal to:

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IR²

CV

Q/t

IR

The waves, which are used to detect the broken bones are called:

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Light waves

x-rays

sound waves

both b and c

100x10³ A= :

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10^-3 A

10^-2 A

10 A

10^-1A

The two inputs of a NAND gate are A and B. Its output would be zero when:

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A = 0, B = 0

A = 1, B= 0

A = 1 , B = 1

A = 0 , B = 1

Specific resistance of copper is ____________ x 10^-8Ohm-meter

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1.62

1.69

5.25

2.75

Intensity level of the sound produced by mosquito buzzing is:

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70 dB

40 dB

10 dB

120 dB

The totally reflectiing prism one angle is of:

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45^o

90^o

180^o

120^o

The water waves obey the laws of:

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Reflection

Refraction

Diffraction

All of these

the resistance of an ammeter should be:

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high

very high

low

constant

No body begins to move or comes to rest of itself was given by

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Newton

Pascal

Bernoulli

Bu Ali Sina

The formula of centripetal acceleration is

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In vibrating string, the points where the amplitude is maximum are called.

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Nodes

Antinodes

Troughs

Crests

When a vector is multiplied by a (-)ve number its direction

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Remains constant

Reversed

Change by 90°

None of these

The frictional effect between the different layers of fluid is called

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Terminal velocity

Stock's law

Viscosity

Surface tension

Sodium chloride in a flame gives

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Green light

White light

Red light

Yellow light

The SI unit of flow rate are

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m-sec^-2

m³-sec^-1

m³-sec^-2

m-sec^-3

The concentration of red blood cells in the blood is nearly.

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40%

60%

25%

50%

A vector is denoted by

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Light face

Bold face

Both a and b

None of these

The fringe spacing in a double slit experiment can be increased by decreasing.

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Wavelength of light

Width of slits

Slit separation

Distance between the slits and the screen

A finite volume of gas consists of

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Small no. of molecules

Large no. of molecule

Average no. of molecule

None of these

The magnitude of back emf:

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Increases with sped of motor

Decreases with speed of motor

Remains same

None of above

When gama rays are emitted, the nuclear mass.

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Decreases by 4 units

Does not change

Increases by 2 units

Increase by 1 unit

All motions are

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Absolute

Uniform

Relative

Variable

An AVO meter can also be called as.

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Digital multimeter

Digital voltmeter

Digital ammeter

Digital ohm meter

Step up transformer is used.

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Step up D.C. voltage

Step up A.C. voltage

Step up both A.C and D.C.

Step up A.C. current

Michael Faraday and Joseph Henry belongs to

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England and USA

France and USA

China and USA

None of these

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Wien's constant

Planck's constant

Davison constant

Lumber's constant

Low level radiations effects

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Less of hair

Ulceration

Drop of white blood cells

All

The energy of the photon of wavelength 500 nm is.

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3.10 eV

2.49 eV

1.77 eV

1.52 eV

One henry is equal to

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1 ohm x 1 sec

1 ohm x 1 hertz

1 ohm x 1 metre

All of above

Resistance tolerance for gold colour is.

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50%

30%

20%

5%