Question # 1

The slopes 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

According to the special theory of relativity, time is

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absolute quantity

not absolute quantity

constant quantity

none of these

Which of the following is not an assumption of kinetic energy

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a finite volume of gas consists of very large number of molecules

the gas molecules are in random motion

collision between the gas molecules are inelastic

the size of the gas molecules is much smaller than the separation between molecules

The resistance of the given conductor can be increased by

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Increasing the area

Changing resistivity

Decreasing the length

None of the above because change does not matter because in any case the volume remains the same

In the formula R = N x m for diffraction grating, N denotes:

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No. of lines/cm

No. of lines/meter

Total number of lines

None of above

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

Crystalline solids are in the form of:

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Metals

Ionic Compounds

Ceramics

Both (A) and (B)

All of these

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

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2.0 x 10^-5/°C

4.0x10^-5/°C

6.0x10^-5/°C

2.33x10^-5/°C

To and fro motion of a body is about its mean position is known as:

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Translatory motion

Vibratory motion

Rotatory motion

None of these

A rotating body tends to be slower, when its angular acceleration is:

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Positive

Negative

Zero

Infinity

The three equation of motions are useful only for

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linear motion with increasing acceleration

line motion with uniform acceleration

linear motion with zero acceleration

linear motion with varying acceleration

The momentum of particle is numerically equal to its kinetic energy.What will be the velocity of the particle?

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4 m/s

1 m/s

2 m/s

None of these

Period of visible light waves is

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2 × 10^-10 sec

2 × 10^-11 sec

2 × 10^-14 sec

2 × 10^-15 sec

At disstolic pressure

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Flow become laminar

Gurgle disappears

External pressure becomes equal

All of these

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3 x 10⁵J

2 x 10⁵J

10⁵J

Zero

An electron and a proton are projected at right angles to a uniform magnetic field with

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the electron trajectory will be less curved than proton’s trajectory

the electron trajectory will be more curved than proton’s trajectory

) both trajectories will be equally curved

) both particles continue to move along a straight lins

Astrophysics is the branch of physics deals with the

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Physics of oceans

Physics of stars and galaxies

Physics of earth crust

None of these

A body of mass 'm' is moved to a height 'h' equal to the radius of the earth.The increase in potential energy is

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2 mgR

mgR

1/2 mgR

1/4 mgR

Internal friction of fluid is

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Resistance

Viscosity

Cohesive force

Surface tension

The magnetic fields are produced by the

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Moving charges

Bar magnets

Motion of conductor in a magnetic field

All of them

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Initial velocity

Variable velocity

Instantaneous velocity

None of these

A body is subjected to a force such that its velocity is doubled then

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Its acceleration is also doubled

Its momentum is also doubled

Its potential energy is also doubled

Its kinetic energy is also doubled

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