Properties of Solids

Define superconductivity of a substance.

What is effect of Pyroelectric coefficient with Temperature?

What are applications of pyroeletricity?

Pyroelectricity is an application of dielectric properties of solid.

What is Pyroelectricity or Pyroelectric Material?

Which of the following is a dielectric property of solids?

What is ferroelectric effect ?

What is dielectric properties in ferroelectric solid? Write one examples of ferroelectric solid.

How a metal becomes a superconductor?

A diode is a combination of $\mathrm{n}$-type and $\mathrm{p}$-type semiconductor.

Transistors are made by sandwiching a layer of one type of _____ between two layers of the other type of semiconductor.

What are transistors and where are they used?

What is diode and where it is used?

Write two daily life applications of semiconductors.

Ferromagnetic substances would make better permanent magnets. Justify the given statement.

Which of the following are dielectric properties of solids:

Dielectric materials are electrical conductors that can be polarised by the application of an electric field.

Explain the electrical conductivity by ionic substances is different from that by metallic ones.

Explain, why does conductivity of germanium crystals increases on doping with gallium?

Explain paramagnetism giving a suitable example.