ET I Lesson 1 Flashcards
to fuckin' learn, dumbass
Democritus provided concepts of what?
Atomic structures of matter
Who first recorded the rubbing of amber induces a state in which it would attract other light objects?
Thales of Miletus
Democritus’ fifth principle states that…
“Varieties of all things depend on the varieties of their atoms, in number, size, and aggregation”
What are some things that electromagnetic tests can do?
ID material and their discontinuities
Who observed that a wire connected to the ends of a battery affected a compass within vicinity?
Hans Christian Orsted
What the fuck did Michael Faraday discover?
When one coil was connected to a battery, there was another current running through a second nearby coil.
He concluded that second current ran in the opposite direction of the first current.
Who was able to explain the relationship between magnetism and electricity?
James Maxwell
Who first recorded the electromagnetic test that distinguished the different types of metal?
David Hughes
What is the definition of an electrical conductor?
Any material that is capable of carrying electrical current.
An alternating current flowing in a conductor will set up:
an alternating magnetic field around the conductor.
A hall effect sensor is a…
noncontact magnetic sensor
What type of current is typically employed in electromagnetic testing instruments?
Alternating Current
The first eddy current instrument was developed in:
1926
What effect does the presence of a discontinuity in the test object cause?
Redistribution of the normal eddy current flow.
The flow of eddy currents primarily depends on which of the following?
Physical and electrical characteristics of the test object.
