Question # 1

The critical temperature of aluminium is

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1.18 K

4.2 K

3.72 K

7.2 K

Specific resistance of a wire depends upon

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Length

Cross-section area

Mass

None

On heating, glass gradually softens into a paste like before it becomes a very viscous liquid at almost

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600°C

7600°C

800°C

900°C

Alfa , beta and gamma rays are emitted from a radio-active substance

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spontaneously

when it is heated

when it is exposed to light

When it interacts with the other particle

Gas constant per molecule is called:

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Universal gas constant

Stefen's constant

Boltzmann constant

Gravitation constant

If the distance of separation between two chares is increased, the electrical potential energy of the system will

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Increase

Decrease

May increase or decrease

Remain the same

Significant figures in 0.0010 are:

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Four

Three

Two

One

Conventional the angular Velocity is Directed at an angle of:

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90° to the axis of rotation

30° to the axis of rotation

0° to the axis of rotation

None of above

While deriving the equation for pressure of a gas we consider the

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rotational motion of molecules

vibrational motion of molecules

linear motion of molecules

all of them

The path described by a projectile is called its

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orbit

trajectory

range

distance

When a mass 'm' is pulled slowly, the spring stretches by an amount x₀,then the average force would be

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F= Kx₀

F=1/2Kx₀

F=2Kx₀

F=4Kx₀

An object is dropped from a height of 100 m. Its velocity at the moment it touches the ground is:

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100 m/sec

140 m/sec

1960 m/sec

196 m/sec

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

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0°C

10°C

17°C

20°C

A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done is 25J. the angle which the force makes with the direction of motion will be:

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60°

90°

30°

0°

A wave, which transfer energy by moving away from the source of disturbance is called a

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progressive wave

travelling wave

both of them

none of them

The rear wheels of an automobile are rotating with an angular velocity of 14 rev/sec which is reduced to 38 rad/sec in 5 second when brakes are applied. Its angular acceleration is:

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5 rad/sec²

-10 rev/sec²

-10 rad/sec²

-5 rev/sec²

In case of metallic conductors, the charge carriers are

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Protons

Electrons

Antiprotons

Positrons

Both A and B

The law of conservation of mass gives us the

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equation of continuity

Bernoulli's theorem

both of them

none of them

A body moving with an acceleration of 5 m/sec²started with velocity of 10 m/sec. What will be the distance traversed in 10 seconds?

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150 m

250 m

350 m

400 m

Angular frequency 'w' is basically a characteristics of

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linear motion

circular motion

both of them

none of them

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

When the speed of a body in a fluid increases then the drag force

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decreases

becomes zero

increases

non of them

Binding energy per nucleus is

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greater for heavy nucleus

least for heavy nucleus

greatest for light nuclei

decreases for medium weight niclei

One newton is a force that produces an acceleration of 0.5 m/sec²in a body of mass:

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2 kg

3 kg

4 kg

8 kg

Blood pressure is measured by the instrument

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stethoscope

sphygmomanometer

barometer

none of them

The graphical representation of ohm's law is

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hyperbola

straight line

ellipse

parabola

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

Least distance of distinct vision of an old man possibly becomes:

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A little less than 25 cm

A little more than 25 cm

Much less than 25 cm

None of these

Physics details with the study of:

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Matter

Energy

Both of them

Human body

A metastable stae:

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Is an excited state

Is that in which excited electron is stable

Is that in which excited electron is usually unstable

Means a time interval of 10^-8second

Both (A) and (C)

The shortest distance between two points directed from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

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