Question # 1

Computer chips are made from:

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Iron

Silicon

Helium

Stontium

Aluminium

The sum of positive and negative peak values are usually written as

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P-P value

negative

zero

may be positive or negative

The rate change of area expressed is expressed in:

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m²s^-1

ms^-2

m²s^-2

ms^-1

None of these

Wave length of light, on the average, is given by:

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10^-14_m

10^-10_m

10^-6_m

10^-4_m

Flurescent screen is a screen where visible spot

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vanishes

is made

becomes small and large

none of these

magnetic field is a:

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Vector quantity

Scalar quantity

Scalar as well as scalar quantity

Any of (A) or (B)

Neither (A) nor (B)

The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as

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classical mechanics

Newtonian mechanics

quantum mechanics

statistical mechanics

A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is:

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0.05 m

0.08 m

0.8 m

0.008 m

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

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IT = 10^-4G

IT = 10⁵G

IT = 10³G

IT = 10⁴G

If one of the pipes has a much smaller diameter than the other and are placed horizontally then form both sides of Bernoulli's equation, we can drop the term

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P

1/2 fv²

pgh

none of them

The relation between charge 'Q' and current 'I' is given by

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Q = I/t

Q = It

Q = I²t

Q = I²/t

Vibratory motion is always under

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Applied force

Restoring force

Periodic force

Gravitational force

The number of translation degress of freedom for a diatomic gas is

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2

3

5

6

When body moves along a circular path with constant speed, it has an acceleration, which is always directed;

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Along the tangent

Towards the centre

Away from the centre

None of them

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

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positive temperature

negative temperature

absolute temperature

zero temperature

Op-amp has been discussed as comparator of:

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Distances

Voltages

Velocities

Magnetic fields

Both (A) and (C)

Tick the conservation force:

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Tension in a string

Air resistance string

Elastic spring force

Frictional force

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

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Greater than

Less than

Equal to

None of these

Which quantity has different dimension:

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Work

Pressure

Energy

Torque

Cosine of an angle is positive in:

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2nd quadrant

3rd quadrant

4th quadrant

All of these

A non-inertial frame of reference is one, in which

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law of inertial is valid

all laws of physics are the same in all frames

a>0 or a<0

a=0

A structure of polymeric solid is:

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An ordered structure

A disordered structure

Intermediate between order and disorder

Any of these

None of these

According to the special theory of relativity, time is

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absolute quantity

not absolute quantity

constant quantity

none of these

Aerodynamics is a branch of

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Hydrodynamics

Thermodynamics

Both of them

Statics

Two forces each of the magnitude F act perpendicular to each other. The angle made by the resultant force with the horizontal will be:

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30°

45°

60°

90°

If we increase the length of a simple pendulum four times, its time period will become

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2 times

3 times

4 times

6 times

The work done by the system on its environment is considered as

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positive

negative

zero

any one of them

The expression of Hook's law is

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F=ma

F=kx

F= -kx

-kx=ma

The natural frequency of a pendulum which is vibrating freely, depends upon its

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mass

length

material

all of them

When a platinum wire is heated, it appears yellow at

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1600°C

900°C

1100°C

1300°C

The circuit in which current and voltage are in phase, the power factor is

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zero

1

negative

0.83

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