Quiz
Test 2
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Perguntas do quiz (33)
1Electrostatic 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- ADirectly
- BInversely
- CInversely
- DDirectly
2Which of the following are laws of electrostatics?
- ACoulomb's law
- BOnly positive charges move in a conductor
- CCharges only move or sit on the surface of conductors
- DConcentration of charges on a curved surface is greatest at the greatest curvature
3Materials that allow moderate flow of electrons are called what?
- AConductors
- BSemiconductors
- CInsulators
4Materials that allow free flow of electrons are called what?
- ASemiconductors
- BConductors
- CInsulators
5Materials that exhibit poor or no flow of electrons are called what?
- AInsulators
- BSemiconductors
- CConductors
6Conductor: [blank_start]Copper[blank_end]
Semiconductor: [blank_start]Silicon[blank_end]
Insulator: [blank_start]Rubber[blank_end]- ACopper
- BSilicon
- CRubber
7States 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- APositive
- BNegative
- CNegative
- DPositive
8Processes 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- AFriction
- BContact
- CInduction
- DContact
- EFriction
- FInduction
- GInduction
- HContact
- IFriction
9What is the branch of science that deals with resting electric charges?
- AElectrostatics
- BElectrodynamics
10What is the study of moving electrons?
- AElectrodynamics
- BElectrostatics
11[blank_start]Electrostatics[blank_end]: static electricity
[blank_start]Electrodynamics[blank_end]: current electricity- AElectrostatics
- BElectrodynamics
- CElectrodynamics
- DElectrostatics
12Flow of electron
[blank_start]Conventional[blank_end]: positive to negative
[blank_start]Electron[blank_end]: negative to positive- AConventional
- BElectron
- CElectron
- DConventional
13Nature 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- AIn a vacuum
- BIn metallic conductors
- CIn ionic solutions
- DIn metallic conductors
- EIn a vacuum
- FIn ionic solutions
- GIn ionic solutions
- HIn a vacuum
- IIn metallic conductors
14What changes chemical energy to electrical?
- ABatteries
- BDynamo or generators
15What changes mechanical energy to electrical?
- ADynamo or generators
- BBatteries
16Potential difference increases with distance
- AVerdadeiro
- BFalso
17Label the image
- Aresistor
- Bcapacitor
- Cdiode
- Dbattery
- Etransformer
18Label the image
- Apower OFF
- BPower ON
- CPower ON/OFF
- DPower ON/OFF/Standby
19When you turn power on:
Current [blank_start]flows[blank_end]
The circuit is [blank_start]closed[blank_end]- Aflows
- Bstops
- Cclosed
- Dopen
20When you turn power off:
Current [blank_start]stops[blank_end]
The circuit is [blank_start]open[blank_end]- Astops
- Bflows
- Copen
- Dclosed
21[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- AFuse
- BCircuit breaker
- CCircuit breaker
- DFuse
22When [blank_start]capacitors[blank_end] discharge, they discharge very quickly, not at a steady pace as in [blank_start]batteries[blank_end]
- Acapacitors
- Bbatteries
- Cbatteries
- Dcapacitors
23The force between two magnetic poles is directly proportional to its strength
- AVerdadeiro
- BFalso
24Who is known as the father of electrodynamics?
- AAndre Marie Ampere
- BCarl Friedrich Gauss
- CNikola Tesla
25Who developed standard magnetic measurements?
- AAndre Marie Ampere
- BCarl Friedrich Gauss
- CNikola Tesla
26Who invented the AC motor?
- AAndre Marie Ampere
- BCarl Friedrich Gauss
- CNikola Tesla
27The strength of the magnetic field is proportional to the number of flux lines
- AVerdadeiro
- BFalso
28Magnetic flux goes south to north outside the magnet and north to south within the magnet
- AVerdadeiro
- BFalso
29High permeability: [blank_start]Easy to magnetize[blank_end]
High retentivity: [blank_start]Difficult to de-magnetize[blank_end]- AEasy to magnetize
- BDifficult to de-magnetize
- CDifficult to de-magnetize
- DEasy to magnetize
30[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- ANonmagnetic
- BDiamagnetic
- CParamagnetic
- DFerromagnetic
31A magnetic field always surrounds a:
- AConductor with current
- BConductor without current
- CStream of electrons in space
32EMF is produced when:
- AConductor moves through magnetic field
- BMagnetic field moves through conductor
33Mutual induction must have DC
- AVerdadeiro
- BFalso
Informações
- Descrição
- test 3
- Autor
- Korie Hi
- Idioma
- English
- Visualizações
- 24
- Etiquetas
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