Question # 1

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

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5

0.5

0.005

50

In magnet-coil experiment, emf can be produced by

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Keeping the coil stationary and moving the magnet

Keeping the magnet stationary and moving

Relative motion of the loop and magnet

Any one of above

All above

The maximum stress that a material can withstand, is known as

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plastic point

elastic limit

yield point

ultimate tensile strength

Acceleration of a body at any particular instant during its motion is known as

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average acceleration

uniform acceleration

instantaneous acceleration

all of them

Which of the following is/are example/s if mechanical waves i.e. waves generated in _______:

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Rope

Coil of spring

Water

All of them

To hear a clear echo, the reflecting surface must be at a minimum distance of

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10 m

16.5 m

33 m

66 m

An axis of rotation

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Is a straight line

Is normal to the plane of rotation

Passes through pivot point O

All of them

Centripetal force performs:

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Maximum work

Negative work

Positive work

None of these

In deriving the Bernoulli's equation, we assume that the fluid is

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incompressible

no viscous

flows in a steady manner

all of them

The unit of decay constant is:

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Second

Metre

Hour

Year

Second^-1

A line which represents the direction of travel of a wave is known as:

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Spherical Wavefront

Locus

Ray

Either B or C

Radian is the unit of angular displacement which is

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Less than degree

Greater than degree

Equal

None of these

The relative permitivity ∈_r for Paraffined paper is

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1.9

2.0

2.2

2.9

In bring an electron towards another electron,electrostatic potential energy of system.

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Decreases

Increases

Remains uncharged

Becomes zero

Such type of fibre in which center core is of high refractive index and the layer over the central core is low refractive index is called

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Step index fibre

Multi mode step index fibres

Multimode graded index fibre

None of these

Light appears to travels in straight lines since

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It is not absorbed by the atmosphere

It is reflected by the atmosphere

Its wavelength is very small

Its velocity is very large

The oil drop gets charged when it

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Pass through the medium

Pass through the atomizer

Light falls on it

All of them

The Bernoulli's equation often expressed in

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In conductors, the valence band and conduction bands are

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Touch each other

Overlapped each other

Largely overlapped

None of these

2π radian is equal to the degrees

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180^o

90^o

360^o

None of these

Young's modulus for lead is

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10

11

15

19

Unit of angular displacement is

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Degree

Revolution

Radian

All

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