Question # 1

Taking the earth to be a spherical conductor of diameter 12.8 x 10³km. Its capacity will be

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711μF

611μF

811μF

511μF

The field around a moving charge is called

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magnetic field

conservative field

non-conservative field

none of these

The range of wavelengths of colurs in the visible colours is

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140 nm to 456 nm

10 nm to 56 nm

410 nm to 656 nm

910 nm to 956 nm

None of these

Huygen principle is used to determine:

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Speed of light

Location of wavefront

About polarized or unpolarized light

None of them

As the bob of the pendulum moves to and fro which of the force is experienced by the bob

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its weight

tension in the string

viscous drag force by air

all of them

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

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Clausius statement of second law

Kelvin'sstatement of second law

Clausius statement of first law

Kelvin's statement of first law

A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done is 25J. the angle which the force makes with the direction of motion will be:

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60°

90°

30°

0°

Glass and high carbon steel are the examples of

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brittle substances

ductile substances

plastic substances

elastic substances

When the bob of simple pendulum is at extreme position, its K.E. will be

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maximum

minimum

zero

all of them

The restoring force is _____ and opposite to the applied force within ______,:

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Equal, elastic limit

Different, the walls of the laboratory

Different, elastic limit

None of these

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

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Electric potential at the surface of the cube is zero

Electric potential within the cube is zero

Electric filed is normal to the surface of the cube

Electric filed varies within the cube

The each atom of pure Ge or Si shares neighboring electrons are

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Three

Four

Five

None of these

As we go above the surface of earth the value of 'g'

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Increase

Remain Constant

Decrease

Increase slightly

Rocket engines lift a rocket from the earth surface because hot gas with high velocity

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Push against the earth

Push against the air

React against the rocket and push it up

Heat up the air which lifts the rocket.

When a mirror of a Michelsion's interferometor is moved a distance of 0.5 mm, 2000 fringes are observed, the wavelength of the light used is

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5000 mm

5000°A

500 cm

2000°A

A tank containing water has an orifice in one vertical side. If the centre of the orifice is 10 m below the surface level in tank, then velocity of efflux is

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44 ms^-1

14 ms^-1

10 ms^-1

49 ms^-1

An n-type semiconductor is obtained by doping germanium or silicon with

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Tetravalent impurity

Trivalent impurity

Pentavalent impurity

Monovalent inpurity

Two lenses of power +12 and -2 diopters are placed in contact the power of combination is

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10 diopters

8 diopters

6 diopters

12 diopters

The magnetic field produced due to circulating currents. The idea was first given by

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Faraday

Ampere

Lenz

None of these

In diffraction grating has feature/features like

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A glass plate

A large numbers of lines are ruled

Spacing between two lines acts as a slit

All of these

Which of the following is not crystalline solid

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Zinc

Copper

Sodium chloride

None of these

Solid state Physics is the branch of physics deals with the

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Atoms and molecules

Structure

Properties

b and c

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