Question # 1

In gases, heat in mainly transferred by:

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Molecular collision

Conduction

Convection

Radiaiton

A body of mass 5 kg i moving with a velocity of 10 ms^-1. Find the force required to stop it in 2s.

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5 N

25 N

20 N

30 N

What flower is known as natural thermometer?

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Rose

Barasicca

Crocus

Tulip

The gravitational force has the ________ relation with the distance between two masses:

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Direct

Inverse

Constant

None

Centre of gravity of sphere is at:

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Centre of sphere

Outside of sphere

Radius of sphere

None of these

________ is the height of an object or place above sea level.

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Altitude

Depth

Sun

Moon

A couple consists of which type of forces :

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Like parallel

Unlike parallel

Not parallel

Nil

Thermal conductivities of Lead

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23

30

35

85

F_x= 4 N and F_y=3N what is F?

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5N

1.5 N

16 N

9 N

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

Which process produced cooling effect?

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boiling

freezing

condensation

evaporation

The S.I unit of power of a lens is:

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Dioptre

Volt

Ampere

Watt

The base of computer operation are:

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1,2

0, 1

0, 2

1, 10

The ration of external force applied on the spring to displacement is called:

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Hooke’s law

Constant

Spring constant

Force

Which form of energy is sound:

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Electrical

mechanical

Thermal

Chemical

Which of the following quantities is not change during refraction of light:

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Its direction

Its speed

Its frequency

Its wavelength

which is a major cause of fires and explosions at many places:

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match sticks

bombs

static electricity

magnetism

Power of electric heater is:

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1500W

4750W

100W

50W

Boolean expression for AND operation is:

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X = A̅

X = A + B

X = A . B

X = A̅B̅

What will be the capacitance of capacitor by joining them in parallel:

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Increased

Much less

Decrease

No change

In CD presence of pits is indicated by:

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0

2

3

1

The instrument used to study the properties of waves is called:

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Ripple tank

Stroboscope

Pendulum

None of these

The number of protons in any atom are always equal to the number of

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Neutrons

Electrons

Positrons

Mesoris

The value of Stefan is constant is:

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4.57 x 10^-8 m²k²

5.67 x10^-8 wm^-2k^-4

6.67x 10^-11 wm²k⁴

7.45 x 10^-9 m² wk³

In case of reverse biasing, current is flown due to:

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Minority charge carriers

Majority charge carriers

Electrons

Protons

Compton shift is maximum for scattering angle of photon

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0^o

90^o

180^o

45^o

Number of Isotopes of Neon gas are

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2

3

4

1

The conventional current is due to the flow of

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Atoms and molecules

Positive charge

Negative charge

Bot (b) and (c)

If the number of turns become double but length remain same, then magnetic field in the solenoid become.

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Half

Double

Remain same

Zero

The force which is responsible for the breaking up of the radioactive element is.

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Weak nuclear force

Strong nuclear force

Electromagnetic force

Gravitational force

The electric field created by positive charge is

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Radially inward

Zero

Circular

Radially outward

The resistance between the inverting (-) and non inverting inputs is called Input resistance and is the order of.

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Ohms

Kilo Ohms

Mega Ohms

Thounds Ohms

The reverse saturation current in a PN junction diode is only due to:

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Majority carriers

Minoritycarriers

Acceptor ions

Donor ions

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