Test 2

Electrostatic force is: [blank_start]Directly[blank_end] proportional to the strength of the charges [blank_start]Inversely[blank_end] proportional to the square of the distance between them

Which of the following are laws of electrostatics?

Materials that allow moderate flow of electrons are called what?

Materials that allow free flow of electrons are called what?

Materials that exhibit poor or no flow of electrons are called what?

Conductor: [blank_start]Copper[blank_end] Semiconductor: [blank_start]Silicon[blank_end] Insulator: [blank_start]Rubber[blank_end]

States of electrification [blank_start]Positive[blank_end]: When a body has deficiency of electrons [blank_start]Negative[blank_end]: When a body has excess electrons

Processes of electrification [blank_start]Friction[blank_end]: Removal and transfer of electrons from one object to another [blank_start]Contact[blank_end]: Charged body touching an uncharged body will impart its charge on the uncharged body [blank_start]Induction[blank_end]: Redistribution of electrical charges between charged and uncharged objects without touching

What is the branch of science that deals with resting electric charges?

What is the study of moving electrons?

[blank_start]Electrostatics[blank_end]: static electricity [blank_start]Electrodynamics[blank_end]: current electricity

Flow of electron [blank_start]Conventional[blank_end]: positive to negative [blank_start]Electron[blank_end]: negative to positive

Nature of current [blank_start]In a vacuum[blank_end]: electrons may jump across a gap between two electrodes [blank_start]In metallic conductors[blank_end]: always flow from higher negative potential to lower [blank_start]In ionic solutions[blank_end]: drift toward opposite charge

What changes chemical energy to electrical?

What changes mechanical energy to electrical?

Potential difference increases with distance

Label the image

Label the image

When you turn power on: Current [blank_start]flows[blank_end] The circuit is [blank_start]closed[blank_end]

When you turn power off: Current [blank_start]stops[blank_end] The circuit is [blank_start]open[blank_end]

[blank_start]Fuse[blank_end]: Device that opens a circuit by literally destroying itself [blank_start]Circuit breaker[blank_end]: Device that opens a circuit (like a switch) when there is an overload

When [blank_start]capacitors[blank_end] discharge, they discharge very quickly, not at a steady pace as in [blank_start]batteries[blank_end]

The force between two magnetic poles is directly proportional to its strength

Who is known as the father of electrodynamics?

Who developed standard magnetic measurements?

Who invented the AC motor?

The strength of the magnetic field is proportional to the number of flux lines

Magnetic flux goes south to north outside the magnet and north to south within the magnet

High permeability: [blank_start]Easy to magnetize[blank_end] High retentivity: [blank_start]Difficult to de-magnetize[blank_end]

[blank_start]Nonmagnetic[blank_end]: Non-permeable [blank_start]Diamagnetic[blank_end]: Repels magnetic materials [blank_start]Paramagnetic[blank_end]: Permeable/non-retentive [blank_start]Ferromagnetic[blank_end]: Permeable/retentive

A magnetic field always surrounds a:

EMF is produced when:

Mutual induction must have DC