Question # 1

Which gas behaves as glass or polythene to radiation:

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Nitrogen

Hydrogen

Carbon di oxide

Methane

Conduction on heat occur at ________ rate in materials

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Different

Same

Both A and B

None

Which law of motion is called law of inertia:

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first law of motion

Second law of motion

Third law of motion

Law of conversation of momentum

Which of the following is an insulator?

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Wood

Glass

Plastic

Steel

a ball is thrown vertically upward. Its velocity at the highest point is.

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10 ms^-2

-10 ms^-1

Zero

none of them

Which of the following is the unit of momentum?

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Nm

Kg ms^-2

Ns

Ns^-1

The specific heat of water is

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2100 Jkg-1 k-1

4200 Jkg-1 k-1

2500 Jkg-1 k-1

2010 Jkg-1 k-1

the to and fro motion of a body about its mean positionis called.

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Circular motion

Random motion

Rotatory motion

Vibratory motion

Normal human body temperature is:

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15 ^oC

37^oC

37^oF

98,6 ^oC

Land and sea breezes are the result of:

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Absorption

Radiation

Conduction

Convection

If an object is moving with a uniform changing speed then speed time graph .

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Variable

Parallel to time axis

Straight line

The cathode ray oscilloscope consists of main parts:

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Two

Three

Four

Five

The galvanometer has been named after the scientist:

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Lewis

Lowry bronsted

Luigi Galvano

Galvano Einstein

1 nano farad is equal to:

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1 x 10^-12 F

1 x 10⁹F

1 x 10^-9F

1 x 10^-6F

The disturbance travelling in a medium is called:

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Wave motion

Simple harmonic motion

Motion

both a and b

Human skin, in dry conditions, has a resistance of:

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20,000 ohm

100,000 ohm

30,000 ohm

2000 ohm

To hear echoes, the minimum distance of the obstacle from source of sound should be:

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10m

15m

17m

20m

In A.C. generator flux will be zero if coil is to the field.

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90^o

45^o

Parallel

Inclined

A digital multimeter is used to measure:

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Current

Resistance

Potential difference

All of above

Sound waves are an example of:

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Transverse waves

Electromagnetic waves

Longitudinal waves

All of these

Astronauts in space need to communicate with each other by radio links because:

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Sound waves travel very slowly in space

Sound waves travel very fast in space

Sound waves cannot travel in space

Sound waves have low frequency in space

Which of the following is not processing:

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Arranging

Manipulating

Calculating

Gathering

Opted unit to measure blood pressure is.

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N/m2

Pascal

mm of Hg

N.m2

Mercury is used as a thermometric substance because

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It is opaque

Does not stick to glass

Has low specific heat

All of these

The dimensional of potential energy per unit volume are same as that of.

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Work

Pressure

Speed

Density

If an object is placed with in the focal length of a convex lens, its image is formed.

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Real

Inverted

Virtual

Smaller than object

The optical fiber is covered for protection by a

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Glass Jacket

Plastic Jacket

Copper Jacket

Aluminum Jacket

Critical angle is that angle of incident ofr which angle of refraction is.

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90 ^o

45 ^o

42 ^o

24 ^o

The magnification of a convex lens of focal length 5 cm is equal to.

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5

6

10

23

A typical diffraction grating has certain number of lines per centimeter whose range is.

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40 to 50

400 to 5000

400 to 500

4000 to 5000

The fringe spacing increases if we use.

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Yellow light

Green lgiht

Blue light

Red light

The SI unit of product of pressure and volume is.

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_Watt

Joule

Pascal

Newton

The molecules of an ideal gas exert

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Force on each other

No force on each other

Large force on each other

Pressure on each other

The most useful tracer is.

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Strontium -90

Iodine -31

Cobalt -60

Carbon -14

Which one has greater cone of impurity among all:

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Emitter

Base

Collector

All are pure

Which one pair belongs to acceptor impurity.

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Aresincl, phosphorus

Boron, gallium

Arsenic, antimony

Antimony, indium

Using relativistic effects the location of an air craft after an hour fight can be predicated about

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20 m

50 m

760 m

780 m

If the following particle have the same energy, which particle has the shortest wave length.

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alpha particle

Neutron

Beta particle

Proton

When charge particle enter perpendicular to magnetic field, the path followed by it is:

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A helix

A circle

Straight line

Ellipes

In order to measure potential difference voltmeter is always connected in.

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Series

Parallel

Both a and b

Neither in series nor in parallel

The main reason for world wide use of A.C is because:

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It is very high power

It can be transmitted over long distance

It is cheaper to use

ALl of above

The field is strong and uniform.

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Inside the solenoid

Surrounding of solenoid externally

Perpendicular to solenoid

All of above

Which of the modulus of elasticity is involved in compressing a rod to decrease its length ?

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Young's modulus

Bulk modulus

Modulus of elasticity

None of these

What is the co-efficient of mutual inductance, when the magnetic flux changes by 2 x 10^-2 Wb, and change in current is 0.01 A?

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2 H

3 H

1/2 H

Zero