Electronic Principles
Which one of the following principles best describes the basic operation of an electromagnet?

Current flowing through a conductor generates a magnetic field
Like magnetic poles attract, while unlike poles repel
Like magnetic poles repel, while unlike poles attract
Current is induced in a conductor that is moving through a magnetic field
None of these

ANSWER DOWNLOAD EXAMIANS APP

Electronic Principles
What is a free electron?

An electron that has twice the amount of charge of a normal electron
An electron that costs nothing
An electron that has been freed from its parent atom
An electron that has no electrical charge
None of these

ANSWER DOWNLOAD EXAMIANS APP