2nd Periodical Exam Reviewer (MAGNETS) Flashcards
How are electromagnets different from magnets?
You can turn an electromagnet on/off.
Which device is used to increase or decrease the voltage from a source?
Transformer
What transformation can take place in an improvised generator?
Mechanical energy to Electrical Energy
What statement about an electromagnet is TRUE?
The electric field strength is inversely proportional to the current.
What transformation take place in electric motor?
Electrical energy to Mechanical Energy
Is increasing the number of permanent magnets increase the strength of a electromagnet or its magnetic field?
NO
Describes the electromagnet of a transformer.
It has primary and secondary coils wound on a magnetic core.
It is commonly attributed to ferromagnetism and electromagnetism depending on the matira land moving charges.
Magnetism
The two magnetic poles
North and south seeking poles
The earth acts like a _________ and has a magnetic field similar to it.
A giant bar magnet
Like charges
Repel
Unlike charges
Attracts
What causes magnetic field to produce?
Moving charges or current
They do not need an electric current to generate magnetism.
Permanent Magnets
A current-carrying conductor placed within a magnetic field will experience ___________.
A magnetic force
