Question # 1

In a cubic crystal, All solids meet at:

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60^o

90^o

109^o

30^o

10^o

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

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outwards

inwards

in either way

none of these

The RMS value of alternating current is:

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0.7 times at the peak value

0.5 times the peak value

0.7 times the Instantaneous value

Equal to maximum voltage

None of these

A ball is dropped vertically down and it takes time t to reach the ground. At time t/2

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The ball had covered exactly half the distance

The velocity of the ball was V/3 where V is the velocity when it reached the ground

The ball had covered less than half the distance

The ball had covered more than half the distance

If the acceleration of a body is negative, then slope of the velocity-time graph will be:

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Zero

Positive

Negative

Infinity

Swimming becomes possible because of______law of motion:

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First

Second

Third

None of these

The interior of a hollow charged metal sphere is a region which:

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Contain some magnitude of electric field

Is full of electric field lines

Is field-free region

Either (A) or (B)

None of these

If one end of a rubber cord is fixed with a support and the other end is wiggled by hand, the waves generated on the card are:

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Stationary waves

Transverse waves

Both of these

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

The sum of two or more vectors is equal to a single vector which is called:

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Component vector

Resultant vector

Product vector

None of these

The word amorphous means:

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Without any structure

With definite structure

Regular arrangement of molecules

Both (B) and (C)

None of these

Polymers have specific gravity which is:

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Low as compared to even the lightest metal

High as compared to the heaviest metal

Intermediate

Any of these

None of tese

The Dimension of acceleration is

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[L²T]

[LT²]

[LT^-2]

None of these

Which force is the medium independent force ?

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Electrostatic force

Nuclear force

Gravitational force

All of them

The dark areas retain their

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negative charges

positive charges

both positive and negative charge

none of these

The SI unit of stress is same as that of

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Momentum

Pressure

Force

Length

Bulk modulus for aluminium is

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40

70

75

95

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

The torque is maximum when the angle between F and r is

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0^o

90^o

180^o

275^o

The direction of torque can be determined by

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Head to tail rule

Right hand rule

Left hand rule

None of these

Uniform acceleration is defined as

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Average acceleration

Instantaneous acceleration

Equal change in velocity and time

None of these

Can a vector have a component greater than the vectors magnitude ?

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yes

No

yes in some cases

None of these

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