Question # 1

Amplitude in SHM is equivalent to ______ in circular motion

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Diameter

Radius

Circumference

None of these

The velocity of sound at same temperature is maximum in

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H₂

N₂

O₂

NH₃

The angle of deflection of coil can be measured by the

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one method

three method

two method

none of these

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

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0

1

0.5

-1

The bicycle pump provides a good example of

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first law of thermodynamics

second law of thermodynamics

third law of thermodynamics

none of them

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

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1 : 2

2 : 3

3 : 4

8 : 9

Whenever a covalent bond breaks, it creates:

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An electron

A hole

An electron-hole pair

A positron

All of these

During the upward motion of the projectile, the vertical component of velocity:

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Decreases

Increases

Remains constant

None of these

In SHM, the acceleration is ______ when velocity is _____:

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Zero, smallest

Smallest, zero

Zero, zero

Zero, greatest

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

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Along the tangent

Toward the centre

Away from the centre

None of them

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

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Double

Remains constant

Half

None of these

According to Young s experiment the distance between two adjacent bright fringes of blue light is _____ than for oranges light

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Less

Maximum

Equal

May be less may be greater depending upon slit spacing

The rate of change of angular momentum is

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The applied force

The moment of inertia

The applied torque

Impulse

The typical speed of Earth around the sun is

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29700 ms^-1

29600 ms^-1

29500 ms^-1

29400 ms^-1

When interference of light takes place

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Energy is created in the region of maximum intensity

Energy is destroyed in region of maximum intensity

Conservation of energy hold goods and energy is redistributed

Conservation of energy does not hold good

A force of 10N is required to move a body with a velocity 10 ms^-1the power developed is

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10 W

50 W

100 W

1000 W

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

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Decreases

Increases

No change

May increase or decrease

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

The dimensions of Young's Modulus are

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[ML^-1T^-1]

[ML^-1T^-2]

[MLT^-2]

[ML^-2T^-1]

The triple point of water is

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100°C

0K

0°C

273.16K

The relation for time of flight is

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How are X-rays diffracted by crystals in X-rays crystallography?

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they bounce off the nucleus

they are diffracted whey they pass from between them acting as a slit

they are diffracted by the electron clouds in the atoms

they hit the side the nucleus and change direction and thus are diffracted

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