Question # 1

The curie temperature of iron is about

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250°C

500°C

750°C

1000°C

Velocity of particle executing SHM will be maximum at

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Extreme position

Mean position

b/w mean and extreme

None

The velocity of a projectile is maximum

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at the point of projection

just before striking the ground

at none of them

at both of them

A body of mass 0.031 kg attached to one end of a spring of spring constant 0.3 N/m, then time period of spring mass system will be:

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1.5 sec

2.0 sec

2.3 sec

2.5 sec

Electrons of an isolated atom are bound to the nucleus, and

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can only have distinct energy level

can only have same energy level

may or may not have distinct energy levels

none of these

The potential difference across each resistance in series combination is

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same

different

zero

none of these

The earth’s potential and potential at infinity are taken:

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Equal

Zero

First is greater than the second

Second is greater than the first

Both (A) and (B)

The general theory of relativity treats problems involving

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inertial frame of references

accelerating frame of references

both of these

none of these

Aerodynamics is a branch of:

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Hydrodynamics

Thermodynamics

Both of them

Statics

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

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voltmeters

resistance

electrode

current

Which force is not a conservative force:

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Frictional force

Gravitational force

Electric force

Elastic spring force

Arsenic, antimony and phosphorus are the elements from

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third group

fourth group

fifth group

none of them

If a car rest acceleration uniformly to a speed of 144 km/h in 20 s it covers a distance of

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20 m

400 m

1440 m

2880 m

The value of the potential difference across the depletion region for the case of germanium is

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0.3 V

0.5 V

0.7 V

0.9 V

In SHM, there is always a constant ratio between displacement if body and its:

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Velocity

Period

Mass

Acceleration

The dimensions of work

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[MLT^-1]

[MLT^-2]

[ML²T^-2]

[MLT]

.Depletion region contains:

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Protons

Positive ions

Negative ions

Both (B) and (C)

Both (A) and (C)

A spring of constant k = 0.4 N m^-1is to be extended through 10 cm at a place where g = 10 m sec^-2. The mass to be suspended should be:

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4 gms

0.4 gm

40 gms

None of these

Sadi carnot described an ideal heat engine in

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1820

1840

1860

1880

The locus of all points in a medium having same phase of vibration is called

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Crest

Trough

Wavelength

Wave-front

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an angle of 60° with the horizontal. The work done by the boy is:

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1.25 J

12.5 J

125 J

None of these

The work performed on an object does not depend on:

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Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

Graph of Black body radiation is example of

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Band spectra

Continuo's spectra

Line spectra

All

A rotating body tends to be slower, when its angular acceleration is:

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Positive

Negative

Zero

Infinity

When the surfaces are coated with a lubricant, then they

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Stick to each other

Slide upon each other

Roll upon each other

None of these

The SI unit of permitivity is

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Nm²C²

N^-1m^-2C²

NmC²

Nm²C^-1

The CRO deflects the beam of electrons, when they passes through uniform

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electric field

gravitational field

magnetic flax

magnetic field

The average of A.C. current and voltage over a complete cycle is

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Maximum

zero

Neither zero nor maximum

None of these

Ethanol (alcohol) as a type of:

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Electric fuel

Bio fuel

Nuclear fuel

None of these

A person is sitting in a traveling train and facing the engine. He tosses up a coin and the coin falls behind him. It can be concluded that the train is

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Moving forward and gaining speed

Moving forward and losing speed

Moving forward with uniform speed

Moving backward with uniform speed

1 gm-cm^-3is equal to:

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10³kg-m^-3

10^-3kg-m^-3

1 kg-m^-3

10⁶kg-m^-1

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