Materials And Components — Part 1 MCQs with Explanations

High permittivity is the correct answer to “For making a capacitor it is better to have a dielectric having”. This question is standard in competitive examination syllabi for Materials And Components.

Air cored is the correct answer to “Which inductor is linear”. This question is standard in competitive examination syllabi for Materials And Components.

Increases is the correct answer to “As the viscosity of a liquid increases, the relaxation time”. This question is standard in competitive examination syllabi for Materials And Components.

True is the correct answer to “The materials which become polarized on the application of mechanical stress are called piezoelectric.”. This question is standard in competitive examination syllabi for Materials And Components.

Ceramic cored is the correct answer to “Which inductor is used at high frequencies”. This question is standard in competitive examination syllabi for Materials And Components.

False is the correct answer to “The dielectric losses do not depend on frequency.”. This question is standard in competitive examination syllabi for Materials And Components.

True is the correct answer to “A characteristic property of crystal is its periodicity of structure.”. This question is standard in competitive examination syllabi for Materials And Components.

The nucleus will be shifted in the direction of E by an amount which is proportional to E. is the correct answer to “An atom of a rare gas is placed is an electric field E. Then”. This question is standard in competitive examination syllabi for Materials And Components.

Debye temperature is the correct answer to “Above a certain temperature, the specific heat of a metal becomes constant. This temperature is called”. This question is standard in competitive examination syllabi for Materials And Components.

Matthiessen’s rule is the correct answer to “The rule that resistivity of conductors can be separated into two parts viz. temperature independent and temperature dependent is known as”. This question is standard in competitive examination syllabi for Materials And Components.

About 200 K is the correct answer to “Debye temperature of metals is”. This question is standard in competitive examination syllabi for Materials And Components.

True is the correct answer to “Electric dipole moment is expressed in debye unit.”. This question is standard in competitive examination syllabi for Materials And Components.

True is the correct answer to “Piezoelectricity means the slight change in dimensions of a specimen when an electric field is applied.”. This question is standard in competitive examination syllabi for Materials And Components.

True is the correct answer to “A leakage capacitor can be represented by a capacitance C and resistance R in parallel C.”. This question is standard in competitive examination syllabi for Materials And Components.

True is the correct answer to “Many compounds also exhibit semiconducting properties.”. This question is standard in competitive examination syllabi for Materials And Components.

True is the correct answer to “Spontaneous magnetisation is characteristic of ferromagnetic materials.”. This question is standard in competitive examination syllabi for Materials And Components.

Partial differential equation is the correct answer to “Schrodinger wave equation is a”. This question is standard in competitive examination syllabi for Materials And Components.

Is a very small fraction of the number of valence electrons is the correct answer to “At room temperature the number of conducting electrons in an intrinsic semiconductor”. This question is standard in competitive examination syllabi for Materials And Components.

Electronic only is the correct answer to “In solid insulator materials having only one kind of atom, the types of polarization which exist are”. This question is standard in competitive examination syllabi for Materials And Components.

True is the correct answer to “A vacant electronic state moves in the same direction as would a positive charge carrier.”. This question is standard in competitive examination syllabi for Materials And Components.

True is the correct answer to “In van der walls crystals, there exists a high degree of stability of the outer electron shell.”. This question is standard in competitive examination syllabi for Materials And Components.

Ionic crystals, valence crystals, metal and vander wall crystals is the correct answer to “On the basis of the type of chemical bonds, solids may be classified into”. This question is standard in competitive examination syllabi for Materials And Components.

1 and 2 only is the correct answer to “Which of the following are true for relative dielectric constant? 1. It is dimensionless. 2. It is equal to 1 for vacuum. 3. It is equal to 1 for all substances.”. This question is standard in competitive examination syllabi for Materials And Components.

The number of electrons-hole pairs generated per second due to thermal motion are equal to the number of electron-hole pairs lost per second due to recombination is the correct answer to “In an intrinsic semiconductor, at a given temperature T”. This question is standard in competitive examination syllabi for Materials And Components.

Decreases with increase in light intensity is the correct answer to “The resistance of a photoconductor”. This question is standard in competitive examination syllabi for Materials And Components.

High thermal conductivity and high melting point is the correct answer to “Electrical contact materials used in switches, brushes, relay must possess”. This question is standard in competitive examination syllabi for Materials And Components.

Recombination is the correct answer to “The merger of hole and free electron is called”. This question is standard in competitive examination syllabi for Materials And Components.

True is the correct answer to “Ferrimagnetic materials have anti parallel orientation of equal moments of permanent dipoles.”. This question is standard in competitive examination syllabi for Materials And Components.

Are shared by all atoms is the correct answer to “In a metal, the valence electrons”. This question is standard in competitive examination syllabi for Materials And Components.

False is the correct answer to “Wood is a diamagnetic material.”. This question is standard in competitive examination syllabi for Materials And Components.

29 is the correct answer to “The number of protons in a copper atom are”. This question is standard in competitive examination syllabi for Materials And Components.

Decrease in metals but increase in intrinsic semiconductor is the correct answer to “With increase in temperature, the electrical conductivity would”. This question is standard in competitive examination syllabi for Materials And Components.

True is the correct answer to “If the number of atoms per unit volume of a monoatomic gas changes, the dielectric constant still remains constant.”. This question is standard in competitive examination syllabi for Materials And Components.

Relatively poor conductors at room temperature is the correct answer to “The elements which become superconducting at extremely low temperatures are”. This question is standard in competitive examination syllabi for Materials And Components.

14 is the correct answer to “The number of protons in a silicon atom are”. This question is standard in competitive examination syllabi for Materials And Components.

Dependent on the concentration of minor component in the alloy is the correct answer to “The residual resistivity of a binary alloy at 0 K is”. This question is standard in competitive examination syllabi for Materials And Components.

False is the correct answer to “Nickel is a non-magnetic material.”. This question is standard in competitive examination syllabi for Materials And Components.

dielectric strength and viscosity is the correct answer to “The most important set of specifications of transformer oil include”. This question is standard in competitive examination syllabi for Materials And Components.

Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects is the correct answer to “If a small amount of Cu is added to Ni conductor, then”. This question is standard in competitive examination syllabi for Materials And Components.

Second hypothesis is of Weiss is the correct answer to “The fact that domains exhibits spontaneous magnetisation is”. This question is standard in competitive examination syllabi for Materials And Components.