Question # 1

Unit of viscosity is:

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Kg m^-1sec^-1

N s m^-2

J s m^-3

All of these

The absolute temperature of the tripple point of water is

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100°C

4°C

373 K

273.16 K

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10^-19C. The number of excess electrons on the drop is

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3.9

4

4.2

6

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

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Equal to

Greater than

Smaller than

None of these

High speed meteors rushing through air reduces to ashes because of:

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Force of gravity

High resistance of air

Drag force

None of these

In case of streamed lined flow of liquid, the loss of energy is

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Maximum

Minimum

Infinite

equal to what is in turbulent flow

When we consider the average velocity of a body, then the body is moving in

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straight line

curved path

may be in a straight or curved path

none of them

The special theory of relativity treats problems invoving

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inertial frame of references

accelerating frame of references

both of these

none of these

The flow of an ideal fluid is

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streamline flow

incompressible flow

non-viscous

all of the above

The instrument which detects the instant at which external pressure becomes equal to the systolic pressure is

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stethoscope

thermometer

manometer

barometer

In an elevator moving vertically up with an acceleration 'g' the force exerted on the floor by a passenger of mass M is

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Mg

1/2 Mg

Zero

2 Mg

The critical temperature T for is

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1.6 K

2.71 K

3.72 K

2.82 K

Young's modulus for lead is

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10

11

15

19

When a large number of atoms are brought close to one another to form a solid, each energy level of an isolated atom splits into sub-levels, called

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energy bands

energy shells

states

all of them

In a Millikan's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10^-19 C.The number of excess electrons on the drop is

Choose an answer

3.9

4

4.2

6

The bonding between the semi-conductor materials is

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covalent

ionic

either of them

none of them

When two semiconductors of p- and n-type are brought into contact, they from a p-n junction which act like a:

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Conductor

Amplifier

Oscillator

Rectifier

The velocity-time graph of a car is a straight line which rises the same height for equal intervals of time, if it moves with

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zero velocity

constant velocity

zero acceleration

constant acceleration

Isothermal temperature Isobaric?

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Pressure

Volume

Heat

Entropy

There are some materials whose resistivity becomes zero below a certain temperature, called

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absolute zero

0° C

critical temperature

lower fixed point

The atoms molecules or ions in a crystalline solids are at room temperature

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Motionless

Vibrate violently

Fixed

Simply vibrate

A motor runs at 20 rev/s and supplies a torque of 75Nm. Power delivered by it is

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6.12 hp

12.6 hp

7.3 hp

8.3 hp

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