16 Questions
What is the purpose of a dielectric material in an electric field?
To allow the electric field to pass through
In what type of material is the electric permittivity (ER) equal to zero?
Metals
What is the nature of an electric dipole?
It has a separation between a positive and a negative electric charge
Which chapter in the course covers the topic of optical properties of materials?
Chapter 21
What is the function of field vectors and polarization in electrical properties?
Aligning in the direction of the electric field
In which type of material can electric fields not pass through?
Metals
What is the formula for the electric dipole moment (p)?
p = qd
How is the dipole moment (p) oriented in relation to the charges?
From the negative to the positive charge
What happens when an electric dipole is placed in an electric field?
A force or torque acts on it to align with the applied field
What is the relationship between surface charge density (D) and the electric field in a dielectric material?
$D = \epsilon E$
In a dielectric, what does the term P represent in the expression for charge density (D)?
Electric polarization
What occurs when very high electric fields are applied across dielectric materials?
Excitation of numerous electrons to energies within the conduction band
What is the phenomenon of material failure due to high electric fields known as?
Dielectric breakdown
What does dielectric strength quantify?
$E$ magnitude required for breakdown
What happens when a dielectric material is present within the plates of a capacitor?
$D$ increases due to polarization
What is the charge density between the plates of a capacitor when a dielectric material is present?
$D = \epsilon E + P$
Test your knowledge of the properties of electric materials with this quiz based on the course contents including introduction, electrical properties, magnetic properties, optical properties, and economic/environmental considerations. This quiz specifically covers field vectors, polarization, and dielectric materials.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
