Question # 1

The upper reference point in thermometer is used to check:

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Melting point

Freezing point

Boiling point

Streaming point

Metals are good conductor of heat due to

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Free Electrons

Big size of their molecules

Small size of their molecules

Rapid vibrations of their atoms

Boiling point of water is:

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0 ^oC

100^oC

212^oC

180^oC

Highly conducting state of matter is:

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Solid

Liquid

Gas

Plasma

A large water reservoir heeps the temperature of nearby land moderate due to:

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Low temperature

Low specific heat of water

Less absorption of heat

Large specific heat of water

Formula of weight is derived from which law?

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First law

Second law

Third law

Law of conservation of momentum

Outer edge of the curved road is elevated to prevent

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Circular motion

Centripetal force

Skidding

Protection

The measure of an object tendency to rotate about same axis is :

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Force

Moment arm

Torque

None of these

Which of the following is an insulator?

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Wood

Glass

Plastic

Steel

Value of 'g' on surface of moon is:

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1.62 ms^-2

3.7 ms^-2

9.2 ms^-2

10 ms^-2

Metals are good conductor of heat dut to the:

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Free electron

Big size of their molecule

Small size of their molecules

Rapid vibrations of their atoms

An object is placed at the Centre of curvature of a concave mirror. The image produced by the mirror is located:

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Out beyond the centre of curvature

At the centre of curvature

Between the centre of curvature and the focal point

At the focal point

A current carrying conductor produces a field around it is called:

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Electric field

Magnetic field

Both a and b

None of these

What happen to the atomic number of an element which emits one alpha particle and a beta particles.

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Increases by 1

Stay the same

Decrease by 2

Decrease by 1

1 KB =______________

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1022 bytes

1023 bytes

1024 bytes

1025 bytes

Which is an example of a longitudinal wave:

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Sound wave

Light wave

Radio wave

Water wave

In series combination of capacitors, each capacitor will have same:

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Voltage

Charge

Capacitance

Charge and voltage

The speed of sound in a liquid is …………..than that in gases:

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Ten times

Fifteen times

Five times

Two times

In computer terminology information means:

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Any data

Raw data

Processed data

Large data

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

When a Uranium (92 protons)ejects a beta particle, how many protons are left in the remaining nucleus?

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89 Protons

90 Protons

91 Protons

93 Protons

the water waves after striking the hurdle will:

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reflect

refract

diffract

all a b and c

Direction of a vector in space requires

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Two axis

Three axis

Four axis

Both a and b

In rotational motion the torque is equal to rate of change of

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Angular velocity

Linear momentum

Angular momentum

Angular acceleration

The focal length of a concave lens is always

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+ve

-ve

Zero

None of these

The unsteady flow of a fluid is called

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Stream line

Turbulent flow

Average flow

Viscous flow

The work done by centripetal force is

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(-)ve

(+)ve

Maximum

Zero

Transformation of heat other forms of energy is discussed in

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Thermal physics

Thermodynamics

Atomic physics

Nuclear physics

When two waves of same frequency travel in opposite direction, the phenomenon will be

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Diffraction

Stationary waves

Polarization

Interference

Unit of acceleration is

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ms-1

ms

ms-2

m2s

Waves transport energy without transporting

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Matter

Force

Momentum

All of these

For an ideal gas, the internal energy is directly proportional to.

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Pressure

volume

Mass

Temperature

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

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Intensity

Speed

Frequency

Wave length

Recently superconductor discovered is at temperature.

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110K

143K

16.3K

119K

Magnetic effect of current is used

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To detect a current

To measure a current

In electric motor

All of above

If the frequency of A.C. supplied is doubled then the capacitive reactance becomes.

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Half

Two

Four times

One fourth

The slope of q-t curve at any instant of time gives.

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Voltage

Current

Charge

Botha a and b

Balmer series lies in region of electromagnetic spectrum.

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Infrared

Visible

Ultraviolet

Fra infrared

The first orbit in the hydrogen atom has a radius.

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0.53 nm

0.053 nm

0.0053 nm

0.00053 nm

The product of resistance and conductance is

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1

Resistivity

Conductance

Zero

In full wave rectification number of diodes required are equal to.

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2

3

4

5

Yield stress is another name of

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Plasticity

Proportional limit

Elastic limit

Both (b) and (c)

The number of crystal system are

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Three

Five

Seven

Fifteen

Commutator was invented by:

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William bills

William Gates

William tells

William Sturgeon