Question # 1

Velocity is a

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scalar quantity

vector quantity

constant quantity

none of them

The law of conservation of energy gives us

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equation of continuity

Bernoulli's theorem

both of them

none of them

When transistors are used in digital circuits they usually operate in the

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Active region

Breakdown region

Saturation and cutoff regions

Linear region

By CAT scans, we can detect the density difference of the order of:

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1%

20%

30%

50%

70%

The rate of decay of a radioactive substance

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decrease exponentially with time

decreases linearly with time

increases linearly with time

increases exponentially with time

In series RC circuit when R=X_c, then the phase angle is

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0°

90°

70°

45°

A second's pendulum is a pendulum whose time period is

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1 second

2 seconds

3 seconds

4 seconds

Momentum is a parameter associated with

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wave motion

particle motion

neither wave nor particle motion

none of these

The charge carriers in an electrolyte are

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Positive ions

Negative ions

Either A or B

Both A and B

Neither A nor B

The device in which induced emf is statically induced emf is:

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Transformer

AC generator

Alternator

Dynamo

Above a certain velocity of a fluid is called

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turbulent flow

steady flow

either of them

both of them

G.P. Thomson observer experimentally that electrons and neutrons possess

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particle-like properties

wave-like properties

neither particle nor wave like properties

none of these

Fluids have three types of energies. The Bernoulli's equation combines those energies.which of the following is one of the three enrgies possessed by a fluid?

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potential energy

pressure energy

strain energy

(a) and (b) only

Which of the following can become a good permanent magnet

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iron

steel

both of them

none of them

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

The ohm's is defined as

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1 ampere / 1 volts

1 coulomb / 1 volt

1 volt / 1 ampere

1 volt / 1 coulomb

Static electricity is produced by the transfer of:

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Electrons

Protons

One fluid

Two fluid

None of these

Melting point of ice

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Increases with increasing pressure

Decreases with increasing pressure

Is independent of pressure

Is proportional to pressure

Two bullets are fired simultaneously, horizontally and with different speeds from the same place. Which bullet will hit the ground first?

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The faster one

Depends on their mass

The slower one

Both will reach simultaneously

With increase of temperature, the viscosity of liquid and gases

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Increases for both

Decreases for both

Increases for liquids and decreases for gases

Decreases for liquids and increases for gases

The magnetic field inside a solenoid can be increased by:

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Increasing n

Decreasing I

Increasing I

By using iron core within solenoid

All correct except (B)

Distance traveled by a body falling from rest in the first, second and third second is in the ration of

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1 : 2 : 3

1 : 3 : 5

1 : 4 : 9

None of the above

Laplace formula is derived from

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Isothermal change

Adiabatic change

Isobaric change

None of these

The process in which energy is dissipated from the oscillating system is known as

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resonance

interference

diffraction

damping

Angular momentum

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Scalar

Axial vector

Polar vector

At 45° angle

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

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negative charges

positive charges

protons

electrons

Referring to above figure, current in the coil P grows from zero to its maximum value

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At the instant the switch is closed

At the instant the switch is opened

When switch is kept open

All of above

Neither of above

Amorphous solids are also called as

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crystalline solids

polymeric solids

glassy solids

any one of them

The field in which work done is moving body between two points depends upon the path followed is called:

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Conservative filed

Non-conservative field

Electric field

None of these

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

An object thrown in arbitrary direction in space with an initial velocity and moving freely under gravity will follow

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a circular path

a straight line

a hyperbola

a parabola

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