Question # 1

Which one of the following elasticizes is possessed by fluids:

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Young's elastic modulus (length)

Bulk elastic modulus (volume)

Modulus of rigidity (shape)

None of these

In order to produce pair production, a photon must have a energy

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0.511 Me v

0.256 Me v

1.02 Me v

0.956 Me v

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

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10Ω

20Ω

30Ω

40Ω

The concept of direction and position are purely

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absolute

relative

absolute or relative

none of these

A body whose momentum is constant must have constant

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Acceleration

Velocity

Force

None of these

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

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power

current

resistance

temperature

SI unit of wave length is:

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Kilometer

Metre

Centimetre

Hertz

Parallel vectors of same magnitudes:

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Are equal

Are unequal

When added give the some equal to zero

Give the answer equal to zero

The tidal energy is due to gravitational pull of :

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sun

moon

Mars

None of these

Most OP-AMP operates with

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+ 6 V supply

+ 10 V supply

+ 12 V supply

+ 24 V supply

Bodies which falls freely under gravity provides good example of motion under:

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Uniform acceleration

Non-uniform acceleration

Uniform velocity

None of these

In a crystal the density of atoms or molecules does not vary from direction to direction. This is known as:

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Cleavage

Anisotropy

Homogeneity

None of these

The slope of the tangent at any point on the curve gives the value of the

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average velocity at that point

instantaneous velocity at that point

average acceleration at that point

instantaneous acceleration at that point

Heat energy extracted from inside the Earth in the form of hot water or steam is the

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Biomass

Scalar energy

Geothermal energy

None of these

Photo cells is a device which convert light into:

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Wave nature

Particle nature

Particle wave nature

Dual nature

When a radioactive nucleus remits a beta particle, the proton neutron ratio:

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Decreases

Increases

Remain same

None of the above

At high speeds the force is no longer

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Proportional

Simply proportional

No proportion

None of these

As isolated system in which

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No internal force acts

No external force acts

No internal and no external force acts

None of these

The waves produced in a stretched string are called

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Stationary waves

Mechanical waves

Transverse mechanical waves

None of these

Age of the Earth is

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14 × 10¹⁷ sec

1.4 × 10¹⁹ sec

1.4 × 10¹⁷ sec

1.4 × 10¹⁵ sec

Heat is a form of

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Power

Work

Energy

Motion

In Michelson's interferometer , the plates are placed in front of incident ray at an angle of:

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45^o

60^o

90^o

120^o

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