Question # 1

The value of the plank's constant 'h' is given by

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1.6 x 10^-19J

1.67 x 10^-27Kg

6.63 x 10³⁴Js

6.63 x 10^-34Js

A pair of quark and antiquark makes a:

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Meson

Baryon

Proton

Neutron

None of these

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

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180 watt

10 watt

20 watt

60 watt

A reversible cycle is the one in which

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some of the changes are reversible

all of the changes are reversible

all of the changes are irreversible

none of them

The charge carriers in gases are

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electrons

ions

protons

ions and electrons

A convex lens acts as diverging lens when the object is placed:

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Between F and 2F

At 2F

With focal length

Beyond 2F

Examples of polymeric substances are:

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Plastic

Synthetic rubbers

Zirconia

All of these

Both (A) and (B)

The driection of vector si space is specified by:

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One angle

Two angles

Three angles

None of above

Flux through a closed surface of any shape and flux through the surface of a sphere drawn around a charge are:

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Different

Same

Such that it is greater in the first case

Such that it is greater in the second case

None of these

The direction of the acceleration is the same as that of

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speed

velocity

both of them

none of them

Dimension of mass is written as:

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M

[M]

(M)

[m]

The angular velocity of a particle rotating in a circular orbit 100 times per minute is

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1.66 rad/s

10.47 rad/s

10.47 deg/s

60 deg/s

A bullet of mass 10 g hits a target and penetrates 2 cm into it.If the average friction offered by the target is 100 N,then the velocity with which the bullet hits the target is

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10 ms^-1

1052 ms^-1

20 ms^-1

20√2 ms^-1

Electric potential of earth is taken to be because earth is a good

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insulator

Conductor

Semi-conductor

Dielectric

Mathematically, the instantaneous acceleration is represented by

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An ideal heat engine can only be 100% efficient if its exhaust temperature is equal to

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0°C

0k

100°C

Temperature of source

The synchronous satellites are very useful for

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Worldwide communicatioin

Weather observations

Navigation

All of these

The constant K in Coulomb's Law depends upon

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Nature of medium

System of units

Intensity of charge

a & b

The relative permitivity ∈_r for Paraffined paper is

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1.9

2.0

2.2

2.9

The medium in which speed of light is the same in all directions is called:

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Homogeneous

Heterogeneous

Non-homogeneous

Free space

The relative velocity before and after the collision is

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V₁+ V₂= V'₂+ V'₂

V₁- V₂= V'₂- V'₁

V₁- V₂=-( V'₂- V'₁)

None of these

One light year is equal to

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9.5 x 10¹⁵m

9.5 x 10¹⁵sec

9.5 x 10¹⁵km

9.5 x 10¹⁵cm

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