PHYSICS 2nd Year MCQs Chapter No.6 PHYSICS OF SOLIDS Test No.1

The band above the valence band is called

The dimensions of stress are:

The electrons occupying the conduction band are known as

Silicon and germanium in their pure form near OK is

Stress required to produce a unit strain is called

Measure of deformation of a solid when stress is applied to it, is called

The atoms or molecules in a crystalline solids are held together by

Artificial polymers are made by a chemical reaction known

The forbidden energy gap of an insulator is of the order of

In the doping process, the ratio of the doping atoms to the semiconductor atom is

Arrangement of molecules in crystalline solids is studied by using:

Under the elastic firm the deformation produced in the material is

The strain energy in a deformed wire of length l acted upon a force F can be graphically calculated by measuring

The word amorphous means:

Shear modulus, mathematically can be written as

Conductors are those materials in which energy gap is

The doped semiconductor materials are called

Stress is mathematically expressed as:

Strain is the ratio of

The amount of strain energy stored in deformed stretched wire is equal to

The strain produced due to tensile stress is called

Which of the following is pentavalent impurity?

Ordinary glass, on heating gradually soften into a paste like state at almost:

The ratio Mishear stress to shear strain is called

Polymeric solids have

A semiconductor in its extremely pure form is known as

Any alternation produced in shapes, length or volume when a body is subjected to some external Force is called

Insulators are those materials in which energy gap is

The materials in which there are plenty of free electron are called

For semi-conductors narrow forbidden energy gap between the conduction and valence bands of a conductor is of the order of

Deformation of body may be the change in its

A element or compound that has definite shape and volume is called:

SI unit of stress is:

At room temperature, Ge or Si crystal becomes a

In case of linear deformation, the ratio Of tensile stress to tensile strain is called

Amorphous solids are Also Called

Amorphous solids are more similar to

Glassy solids have:

The angular deformation produced in a body is called

which of the following is polymeric solid?

The valence band of an atom in a solid

Nm² is called

The unit of modulus of elasticity is

The dimensions of strain are

A stress which changes one dimension only is called

A structure that is intermediate between solid and liquid is called

conduction based may be

The branch of physics that deals with the nature and properties of matter in the solid state is called:

SI unit of stress is same as of

A moving hole in a diode behaves like a

The whole structure obtained by the repetition of unit cell is known as

Which of the following is trivalent impurity?

Conductors have conductivities of the order of

Sodium chloride exit in the form of

The process of adding a small amount of impurity into the pure semiconductor material is called

Which of them is not a crystalline solid

Molecules of solid possess

The ratio of volumetric stress to volumetric strain is called

The electrons in the outermost shell of an atom are called

Glass and high carbon steel are the examples of

SI unit of strain is

A solid having regular arrangement of molecules throughout its structure is called:

Insulators have conductivities ranging between

Conductivity of semiconductor increases by

A semi-conductor formed by the addition of a trivalent impurity is called

When stress changes the shape of a body, it is called

Within elastic limit, strain is directly proportional to stress, is the statement of

A semiconductor formed by the addition of a pentavalent impurity is called

When a covalent bond is broken in a doped semiconductor

The reciprocal of bulk modulus is called

The strain energy stored in any length of wire due to action of stress appears as

The force applied on unit area to produce any change in the shape, length or volume of a body is called

The strain produced due to compressive stress is called

Which one of the following acts as a positive charge carrier in a semiconductor

Synthetic materials belong to

Polymeric solids exhibit

The smallest three dimensional basic structure in a crystalline solid is called

The ratio of stress to strain is called

When a stress changes the length of a body, it is called

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

The substances which creak just after the elastic limit is reached, arc called

Young's modulus, mathematically can he written as

Which of the following' is a crystalline solid?

The ability of any body to return to its original shape is called

Glass is also known as

Natural rubber has the formula:

Materials have specific uses depending upon their characteristics and properties such as:

Semi-conductor have conductivities of the order of

A empty or partially filled band is called

The band above the valence band are normally

Bulk modulus, mathematically can be written as

Force applied on a unit area of a crystal is culled

Such a deformation in which the body regains its original shape after the removal of applied stress is called

Stress varies linearly with strain with in ---- limit

The maximum stress which a body can bear is called

The value of stress beyond which the body is permanently deformed is called

The units of modulus of elasticity are the same as those of

The materials in which valence electrons are bound very tightly to their atoms are known as

Polymers may consists of

Amorphous solids are more like

At 0 k, a piece of Ge or .Si is a perfect

Every crystalline solid has: