Test 2

1

Electrostatic force is:
( Directly, Inversely ) proportional to the strength of the charges
( Inversely, Directly ) proportional to the square of the distance between them

1

Which of the following are laws of electrostatics?

1

Materials that allow moderate flow of electrons are called what?

1

Materials that allow free flow of electrons are called what?

1

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

1

Conductor: ❌
Semiconductor: ❌
Insulator: ❌

Copper

Silicon

Rubber

1

States of electrification
( Positive, Negative ): When a body has deficiency of electrons
( Negative, Positive ): When a body has excess electrons

1

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

1

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

1

What is the study of moving electrons?

1

( Electrostatics, Electrodynamics ): static electricity
( Electrodynamics, Electrostatics ): current electricity

1

Flow of electron
( Conventional, Electron ): positive to negative
( Electron, Conventional ): negative to positive

1

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

1

What changes chemical energy to electrical?

1

What changes mechanical energy to electrical?

1

Potential difference increases with distance

1

Label the image

resistor

capacitor

diode

battery

transformer

1

Label the image

power OFF

Power ON

Power ON/OFF

Power ON/OFF/Standby

1

When you turn power on:
Current ( flows, stops )
The circuit is ( closed, open )

1

When you turn power off:
Current ( stops, flows )
The circuit is ( open, closed )

1

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

1

When ( capacitors, batteries ) discharge, they discharge very quickly, not at a steady pace as in ( batteries, capacitors )

1

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

1

Who is known as the father of electrodynamics?

1

Who developed standard magnetic measurements?

1

Who invented the AC motor?

1

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

1

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

1

High permeability: ( Easy to magnetize, Difficult to de-magnetize )
High retentivity: ( Difficult to de-magnetize, Easy to magnetize )

1

❌: Non-permeable
❌: Repels magnetic materials
❌: Permeable/non-retentive
❌: Permeable/retentive

Nonmagnetic

Diamagnetic

Paramagnetic

Ferromagnetic

1

A magnetic field always surrounds a:

1

EMF is produced when:

1

Mutual induction must have DC

test 3

Electrostatic force is: Directly Inversely( Directly, Inversely ) proportional to the strength of the charges Inversely Directly( Inversely, Directly ) 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: ❌ Semiconductor: ❌ Insulator: ❌

States of electrification Positive Negative( Positive, Negative ): When a body has deficiency of electrons Negative Positive( Negative, Positive ): When a body has excess electrons

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

What is the study of moving electrons?

Electrostatics Electrodynamics( Electrostatics, Electrodynamics ): static electricity Electrodynamics Electrostatics( Electrodynamics, Electrostatics ): current electricity

Flow of electron Conventional Electron( Conventional, Electron ): positive to negative Electron Conventional( Electron, Conventional ): negative to positive

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 flows stops( flows, stops ) The circuit is closed open( closed, open )

When you turn power off: Current stops flows( stops, flows ) The circuit is open closed( open, closed )

Electrostatic force is:
( Directly, Inversely ) proportional to the strength of the charges
( Inversely, Directly ) proportional to the square of the distance between them

Conductor: ❌
Semiconductor: ❌
Insulator: ❌

States of electrification
( Positive, Negative ): When a body has deficiency of electrons
( Negative, Positive ): When a body has excess electrons

( Electrostatics, Electrodynamics ): static electricity
( Electrodynamics, Electrostatics ): current electricity

Flow of electron
( Conventional, Electron ): positive to negative
( Electron, Conventional ): negative to positive

When you turn power on:
Current ( flows, stops )
The circuit is ( closed, open )

When you turn power off:
Current ( stops, flows )
The circuit is ( open, closed )

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

When ( capacitors, batteries ) discharge, they discharge very quickly, not at a steady pace as in ( batteries, capacitors )

High permeability: ( Easy to magnetize, Difficult to de-magnetize )
High retentivity: ( Difficult to de-magnetize, Easy to magnetize )

❌: Non-permeable
❌: Repels magnetic materials
❌: Permeable/non-retentive
❌: Permeable/retentive