Question # 1

The orbital speed of a low orbit satellite is:

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Zero

8 ms^-1

800 ms^-1

8000 ms^-1

The study of the structure and properties of atom is called.

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Electricity

Nuclear physics

Geo Physics

Atomic Physics

Which of the following material has large specific heat?

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Copper

Ice

Water

Mercury

___________ specific heat of water is benefits in sustaining life.

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High

Low

Medium

None

The number of forces that can be added by head to tail rule are

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2

3

4

Any Number

Which is expert thermal climber:

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Crow

Sparrow

Hawks

None

Co-efficient of friction between glass and glass.

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1.0

0.9

1

0.8

Graph is plotted between ........ variable.

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1

2

3

4

On heating Air becomes.

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Heavier

Lighter

Remain same

None

Good conductor is :

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Air

Wood

Iron

None

The SI unit of thermal conductivity is

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Wm K-1

Wm-1K

Wm-1K -1

WmK

The output of a two input NOR gate is 1 when:

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A is 1 and B is 0

A is 0 and B is 1

Both a and b are 0

Both a and b are 1

Intensity level of the sound produced by mosquito buzzing is:

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70 dB

40 dB

10 dB

120 dB

Coulomb's law is mathematically stated as:

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F = k q1 q2/r3

F = k q2 q2 / r2

F = k q1 q2 / r

F = k q1 q2 / r2

waves whose speed is equal to speed of light are:

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X-rays

sound rays

electromagnetic waves

shock waves

Which of the following characteristics of a wave is independent of the others:

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speed

frequency

amplitude

wavelength

When you rub a plastic rod against your hair several times and put it near some bits of paper, the pieces of papers are attracted towards it. What does this observation indicate?

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the rod and the paper are oppositely charged

the rod acquires a positive charge

the reod and the paper have the same charges

the rod acquires a negative charge

How does sound travel from its source to your ear:

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By changes in air pressure

By vibration in wires or strings

By electromagnetic waves

By infrared waves

The emission of electron from the surface of hot metal is called:

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Ionization

Conduction

Thermionic emission

Convection

If a dielectric medium is present between two point charges them electrostatic force will be:

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Increased

Decreased

Vanishes

Remain same

In totally reflecting prism one angle is of 90°, and other two angles are of:

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30°,30°

45°,90°

45°,45°

40°,40°

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

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10 m

15 m

17 m

20 m

Multimode graded index fibre has a core whose diameter range lie from.

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5 to 50 micro meter

50 to 100 micro meter

40 to 1000 micro meter

50 to 10,000 micrometer

The focal length of convex lens

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Negative

Positive

small

Large

Which one is true for isothermal process.

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Q = 0

W = 0

Q = W(D) Delta U = 0

None of these

A communication satellite is used ot reflect the signal of.

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Microwaves

Radio waves

y rays

x -rays

Environmental crisis are also known as

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Population crisis

Entropy crisis

War crisis

Mass crisis

If heat is added to a system, then its entropy will.

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Increases and positive

Decrease and positive

Increases but negative

Decreases but negative

the systolic pressure of normal healthy person is.

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120 torr

130 torr

115 torr

110 torr

The unit o pressure of gas is

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Nm^-2

Pascal

Atmosphere

All of these

Beats can be heard when difference of frequency is not more than.

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8 Hz

10 Hz

4 Hz

6 Hz

Unite of thermodynamics scale of temperature is.

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Centigrade

Fahrenheit

Kelvin

Celsius

A man of 1 kg is freefalling. The force of gravity is

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1 N

9.8 N

0.5 N

Zero

Which of the following is similar to electron.

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Beta particle

Alpha particle

Neutron

Proton

X=A+B is the mathematical notation for.

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OR gate

NOR gate

NAND gate

AND gate

For a current carrying solenoid the term 'n' has unit as.

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No unit

m^-1

m^-2

m-3

An in cudutor may store energy in

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Its magnetic field

Its coil

Its electric field

A neighboring circuit

the core of transformer is laminated so reduce.

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Magnetic loss

Hysteresis loss

Eddy current loss

Electric loss

The Balmer series is obtained when all the transition of electrons terminate on

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1^st orbit

2nd orbit

3rd orbit

4th orbit

Impedance is denoted by:

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A

Z

P

Q

One ohm is equal to

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VC-1

CV-1

AC-1

VA^-1

Which of the following is typical source of alpha particle.

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Strontium -94

Radon -222

Cobalt -60

Zic sulphate

In LR circiut which one of the following statements is correct?

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L and R opposes each other

R value increases with frequency

The inductive reactance increases with frequency

The inductive reactance decreases with frequency

Unit (S.I) of temperature coefficient of resistivity of a material is

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K

K^-1

^oC

K^-2