Magnetic Properties Units Quiz

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What is the symbol for Magnetomotive force?

H

B

F (correct)

Φ

Who introduced the unit of Gilbert for magnetic properties?

James Clerk Maxwell

Karl Friedrich Gauss

William Gilbert (correct)

Nikola Tesla

What is the SI unit for magnetic flux density?

Oersted (Oe)

At/m

Tesla (T) (correct)

Gauss (G)

What does the nucleus of an atom contain?

Protons and neutrons Signup and view all the answers

Which scientist is associated with the unit of Maxwell (Mx) for magnetic properties?

James Clerk Maxwell Signup and view all the answers

What do valence electrons control in an atom according to the text?

Chemical and electrical properties Signup and view all the answers

According to Gauss's law for electricity, how can the electric field due to electric charges be derived?

By Coulomb's Law Signup and view all the answers

What does Gauss’ law for magnetism state about the net magnetic flux through any closed surface?

It is always zero Signup and view all the answers

According to Ampere’s law, what can produce magnetic fields apart from electric currents?

Changing electric fields Signup and view all the answers

What property do particles need to possess in order for the electromagnetic field to exert a force on them?

Electric charge Signup and view all the answers

In electromagnetism, what does Faraday’s law of induction describe?

Production of electric fields due to changing magnetic fields Signup and view all the answers

What does Gauss’s law for magnetism say about the behavior of magnetic field lines within a closed surface?

They form closed loops entering and exiting the surface Signup and view all the answers

What is the phase shift angle when the power factor is 0.95?

18.19° Signup and view all the answers

What is the current through the motor when the power factor is 0.95 and R = 6.0 amp?

7.6 A cos 38.09 Signup and view all the answers

What is magnetomotive force (mmf) analogous to in electric circuits?

Electric voltage (emf) Signup and view all the answers

What are the forces between magnets primarily caused by?

Moving electric charges in atoms Signup and view all the answers

What is the total field effect or 'substance' of a magnetic field analogous to in electric circuits?

Magnetic flux Signup and view all the answers

What material were the first known magnets made of?

Lodestones (Fe3O4) Signup and view all the answers