Question # 1

The solids which has structure in-between order and disorder are called

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amorphous solids

polymeric solids

crystalline solids

all of them

An emf is set up in a conductor when it

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Is kept in a magnetic field

Is kept in an electric field

Moves across a magnetic field

Both A and B

None of these

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

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Charge Q

Potential V

Capacity

Energy U

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

Torque is also called:

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Momentum

Linear inertia

Moment of a force

Mass

A 1000 Kg car travelling with a speed of 90 km/hr turns around a curve of radius 0.1 km. The necessary centripetal force comes out to be:

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8.1 X 10⁷N

625 N

6250 N

None of these

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

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Maximum

Minimum

Zero

Very small

None of these

Centripetal acceleration is also called ______ acceleration

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Tangential

Radial

Angular

None of them

The pattern of NaCl particles have a shape which is :

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Cubic

Body centred cubic

Simple cubic

face centred

Both (A) and (C)

Selenium is:

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An insulator

A conductor

Both A and B

Excellent conductor

None of these

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

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one ohm

one joule

one volt

one ampere

A telescope is rotatable about the same vertical axis as the turntable, with a scale which is

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Main scale

Vernier scale

Half degree scale

None of these

A change in position of a body from its initial position to its final position is known as

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relative motion

displacement

distance

acceleration

The valence energy band can never be

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Filled

Partially filled

Empty

None of these

If a source of emf is traversed from positive to negative the potential change will be:

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Positive

Negative

Zero

Constant

In place of spark plug, the diesel engine requires also

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High speed air

High temperature air

Low temperature air

None of these

Which will be more effective in knocking a bear down

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A rubber bullet

Lead bullet of same momentum

A wood bullet

None of these

In YDS experiment, at the center of screen is formed a:

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Dark fringe

Bright fringe

No fringe at all

None of these

The fringe spacing in case of red light

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Increases

Decreases

Remains the same

None of these

Age of the Universe is

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5 × 10¹⁵ sec

5 × 10¹⁷ sec

5 × 10¹⁹ sec

None of these

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted.The new capacitance is

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C

C/2

Zero

2C

A uniform beam of weight 100 N is 4 m long and is supported 1.0 m from one end. A load of weight wN hangs from that ened and the beam is in equilibrium.What is the value of w?

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50 N

75 N

100 N

200 N

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