Electrical Engineering Materials Lecture Notes Quiz

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What are the factors affecting the resistivity of electrical materials?

Temperature, impurities, and crystal structure

What is the motion of an electron in an electric field?

The electron experiences drift

What is the equation of motion of an electron?

Newton's second law of motion

What is thermionic emission?

The emission of electrons from metals due to heat Signup and view all the answers

What is the significance of the loss tangent in dielectric materials?

It indicates the amount of energy lost as heat Signup and view all the answers

What are the dielectric properties of polymeric systems?

Polymeric systems exhibit frequency and temperature dependence of the dielectric constant Signup and view all the answers

What are the three types of magnetic materials discussed in the text?

Diamagnetism, paramagnetism, ferromagnetism Signup and view all the answers

Which material has the highest electrical conductivity?

Silver Signup and view all the answers

What is the next most conductive material after silver?

Copper Signup and view all the answers

Why is aluminium becoming more important as a conductor material?

It is light and has high conductivity Signup and view all the answers

Why does gold not find use in the electrical industry?

It is expensive Signup and view all the answers

What is superconductivity?

Vanishing resistivity at absolute zero Signup and view all the answers

What is the effect of temperature on the electrical resistance of most metals?

Increases with temperature Signup and view all the answers

What effect does alloying have on the electrical conductivity of a solid solution alloy?

Drops off rapidly with increased alloy content Signup and view all the answers

How does cold work affect the conductivity of a metal?

Decreases the conductivity Signup and view all the answers

What is the effect of age hardening on the resistivity of an alloy?

Increases the resistivity Signup and view all the answers

Electrical Engineering Materials Lecture Notes Quiz

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