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P4
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1Paint gun [blank_start]negatively[blank_end] charged. Paint particles become [blank_start]negatively[blank_end] charged as they gain [blank_start]electrons[blank_end] in the gun. The [blank_start]negatively[blank_end] charged atoms will [blank_start]repel[blank_end] and spread [blank_start]evenly[blank_end] on the [blank_start]positively[blank_end] charged surface that is being painted.
- Anegatively
- Bnegatively
- Celectrons
- Dnegatively
- Erepel
- Fevenly
- Gpositively
2Defibrillators:
Two [blank_start]statically[blank_end] charged paddles are put in contact with the patients [blank_start]chest[blank_end]. The defibrillator discharges into the patient and the charge is passed through the patient to make the [blank_start]heart[blank_end] [blank_start]contract[blank_end]- Astatically
- Bchest
- Cheart
- Dcontract
3What are the disadvantages of using electrostatics in spray painting?
- AAerosols can contains CFCs which lead to ozone depletion
- BIt is very messy
- COnly can paint objects of opposite charge as paint needs to be attracted to the object
- DIt can only cover a small surface area at a time
4What are the advantages of using electrostatics in spray paint?
- APaint repels so there's an even coating and it covers a large surface area quickly.
- BReduces waste as paint doesn't drip
- CLasts for longer
5Process of static charging:
When two [blank_start]insulators[blank_end] are [blank_start]rubbed[blank_end] together this creates [blank_start]friction[blank_end]. This [blank_start]friction[blank_end] drags the [blank_start]electrons[blank_end] from one object to the other object. The [blank_start]electrons[blank_end] dragged onto the other object cannot move as [blank_start]insulators[blank_end] do not allow [blank_start]electrons[blank_end] to [blank_start]move[blank_end]. The object that has [blank_start]gained[blank_end] [blank_start]electrons[blank_end] becomes negatively charged, while the object that has [blank_start]lost[blank_end] [blank_start]electrons[blank_end] becomes positively charged- Ainsulators
- Brubbed
- Cfriction
- Delectrons
- Efriction
- Felectrons
- Ginsulators
- Helectrons
- Imove
- Jgained
- Kelectrons
- Llost
- Melectrons
6What will two insulating materials with the same charge do?
- ARepel from eachother
- BAttract to eachother
- CNothing - they are insulators
7Static can only form on [blank_start]insulators[blank_end] as the electrons are [blank_start]not[blank_end] able to move around.
- Ainsulators
- Bconductors
- Cnot
- Dwell
8Electrons in [blank_start]conductors[blank_end] are free to move around while in [blank_start]insulators[blank_end] the electrons cannot move.
- Aconductors
- Binsulators
9Grounding/earthing:
[blank_start]Conductor[blank_end] is placed next to the insulator - it goes right the way to the ground. The [blank_start]negatively[blank_end] charged ions in the insulator want to [blank_start]repel[blank_end] from eachother and get as far away as possible - the [blank_start]conductor[blank_end] allows them to do this. The [blank_start]conductor[blank_end] allows the negative electrons to spread out and travel down the conductor into the ground -removing the [blank_start]static[blank_end] [blank_start]charge[blank_end] from the [blank_start]insulator[blank_end].- AConductor
- Bnegatively
- Crepel
- Dconductor
- Econductor
- Fstatic
- Gcharge
- Hinsulator
10Which is the true definition of what earthing/grounding does?
- ARemoves the static charge from the insulator
- BHelps the insulator to keep its static charge
- CAllows the insulator to gain static charge
11An insulating material can become electrically charged if...
- AIt is rubbed with another insulating material
- BIt is rubbed with a conducting material
- CIt is rubbed with a material of the opposite charge
12Anti - static s[blank_start]prays[blank_end], l[blank_start]iquids[blank_end] and c[blank_start]loths[blank_end] help to reduce static electricity by preventing the [blank_start]transfer[blank_end] of [blank_start]charge[blank_end] from one [blank_start]insulator[blank_end] to another. With no build up of charge there can be no discharge.
- Aprays
- Biquids
- Cloths
- Dtransfer
- Echarge
- Finsulator
13In these situations static electricity is not dangerous but can be a nuisance:
It can cause dirt and [blank_start]dust[blank_end] to be attracted to [blank_start]insulators[blank_end] such as [blank_start]television[blank_end] screens and [blank_start]computer[blank_end] monitors.
It can cause some fabrics to [blank_start]cling[blank_end] to your [blank_start]skin[blank_end].- Adust
- Binsulators
- Ctelevision
- Dcomputer
- Eskin
- Fcling
14Every danger of static electricity is due to the static (build up of electrons) ...
- AInterfering with the microwaves in the atmosphere
- Bsparking to something flammable/imflammable
- Ccreating a force of attraction
15Connecting an aircraft to a fuel tanker ensures that any [blank_start]charge[blank_end] built up on the fuel by friction, as it flows though the pipe, flows to [blank_start]earth[blank_end], making sure that there is no discharge and s[blank_start]park[blank_end] to [blank_start]ignite[blank_end] the fuel.
- Acharge
- Bearth
- Cpark
- Dignite
16The chance of receiving an electric shock can be reduced by...
- AEnsuring that all appliances are correctly earthed/grounded
- BUsing insulation mats effectively
- CWearing shoes with insulating soles
- DNot wearing conductors
17Lorries that contain flammable gases, liquids and powders need to be earthed before unloading as [blank_start]friction[blank_end] can lead up to a [blank_start]build[blank_end] up of [blank_start]charge[blank_end]. This charge could lead to a [blank_start]spark[blank_end], which could then [blank_start]ignite[blank_end] the flammable substance.
- Afriction
- Bcharge
- Cbuild
- Dspark
- Eignite
18When is a spark created during grounding/earthing?
- AWhen the electrons jump the gap between the insulator and the conductor
- BWhen the electrons are pulled from one insulator to another
- CWhen an atom becomes ionised
19What colour is the earth wire and what does it do?
- AGreen and yellow
- BBlue
- CSafety wire - stops the appliance becoming live
- DProvides a fuse
20What colour is the live wire and what does it do?
- ABrown
- BGreen and yellow
- CCarries current to the appliance at high voltage - about 230 Volts
- DPrevents it from becoming live
21Fuses, switches and circuit breakers are always part of a [blank_start]live[blank_end] [blank_start]wire[blank_end] circuit.
- Alive
- Bwire
22What colour is the neutral wire and what does it do?
- ABlue
- BBrown
- CCompletes the circuit and carries the current away from the appliance.
- DProvides insulation
23Relays:
[blank_start]Coil[blank_end] of [blank_start]wire[blank_end] receives a current and it generates a [blank_start]small[blank_end] [blank_start]magnetic[blank_end] field.
If a dangerous electrical current goes to the coil, it makes a much [blank_start]bigger[blank_end] magnetic field.
This flicks the [blank_start]metal[blank_end] switch opposite [blank_start]up[blank_end], meaning all appliances in that area/zone will turn [blank_start]off[blank_end]
The switch needs [blank_start]reset[blank_end] not replaced- ACoil
- Bwire
- Csmall
- Dmagnetic
- Ebigger
- Fmetal
- Gup
- Hoff
- Ireset
24An earthed conductor can [blank_start]never[blank_end] become live as earthing means connecting the [blank_start]conductor[blank_end] to earth, which takes away any [blank_start]charge[blank_end] that could electrocute people.
- Anever
- Bconductor
- Ccharge
25Some appliances don't need an earth wire as the [blank_start]outer[blank_end] case of the appliance is made of an [blank_start]insulator[blank_end]. This means they are [blank_start]double[blank_end] [blank_start]insulated[blank_end] ; even if the live parts touch the case it doesn't matter because the case is an [blank_start]insulator[blank_end].
- Ainsulator
- Bouter
- Cdouble
- Dinsulated
- Einsulator
26All electrical appliances with outer metal cases must have an [blank_start]earth[blank_end] wire. This means that the outer case of the appliance is connected to the [blank_start]earth[blank_end] [blank_start]pin[blank_end] in the plug through the [blank_start]earth[blank_end] wire.
- Aearth
- Bpin
- Cearth
- Dearth
27How does the earth wire and fuse protect the appliances with outer metal casing?
1.) A [blank_start]fault[blank_end] in the appliance causes the casing to become [blank_start]live[blank_end], usually because the [blank_start]live[blank_end] wire [blank_start]touches[blank_end] it.
2.) The circuit [blank_start]short[blank_end]-[blank_start]circuits[blank_end] as the earth wire offers less [blank_start]resistance[blank_end]. Charge on the [blank_start]metal[blank_end] casing flows along the [blank_start]earth[blank_end] wire as a very large [blank_start]current[blank_end].
3.) The fuse wire [blank_start]melts[blank_end] ( or the circuit breaker trips)
4.) The circuit is [blank_start]broken[blank_end] and the appliance and the user are protected- Afault
- Blive
- Clive
- Dtouches
- Ecircuits
- Fshort
- Gresistance
- Hmetal
- Iearth
- Jcurrent
- Kmelts
- Lbroken
28Basics on how a fuse works if a fault causes the [blank_start]current[blank_end] in the appliance so exceed the [blank_start]current[blank_end] rating of the fuse.
1.) [blank_start]Fuse[blank_end] wire gets [blank_start]hot[blank_end] and [blank_start]melts[blank_end] or breaks
2.) [blank_start]Circuit[blank_end] is broken so no [blank_start]current[blank_end] can flow
3.) Fuse prevents the flex/cable [blank_start]overheating[blank_end]
4.) Appliance is protected.- Ahot
- Bmelts
- CFuse
- Dcurrent
- Ecurrent
- FCircuit
- Gcurrent
- Hoverheating
29For the fuse safety system to work properly, the current [blank_start]rating[blank_end] of the [blank_start]fuse[blank_end] must be just [blank_start]above[blank_end] the normal current that flows through the appliance.
- Arating
- Babove
- Cfuse
30A [blank_start]fuse[blank_end] is used to prevent cables or appliances from [blank_start]overheating[blank_end] and/or catching [blank_start]fire[blank_end]. The fuse is attached to the [blank_start]live[blank_end] [blank_start]wire[blank_end] so that if there is a dangerous level of [blank_start]current[blank_end] it will [blank_start]melt[blank_end] before the dangerous level of [blank_start]current[blank_end] reaches the appliance. A [blank_start]circuit[blank_end] [blank_start]breaker[blank_end] does a similar job but the circuit breaker can be [blank_start]reset[blank_end] whereas the fuse has to be [blank_start]replaced[blank_end].
- Aoverheating
- Bfire
- Cfuse
- Dlive
- Ewire
- Fmelt
- Gcurrent
- Hcurrent
- Icircuit
- Jbreaker
- Kreset
- Lreplaced
31Tracers are used in industry to:
[blank_start]Track[blank_end] the dispersal of [blank_start]waste[blank_end]
Find [blank_start]leaks[blank_end] and b[blank_start]lockages[blank_end] in underground [blank_start]pipes[blank_end]
Find the [blank_start]routes[blank_end] of underground [blank_start]pipes[blank_end]- ATrack
- Bwaste
- Cleaks
- Dlockages
- Epipes
- Froutes
- Gpipes
32To detect leaks or blockages in pipes:
1.) A radioactive material that emits [blank_start]gamma[blank_end] [blank_start]rays[blank_end] is put into the pipe
2.) A [blank_start]gamma[blank_end] source is used because [blank_start]gamma[blank_end] can penetrate through to the surface
3.) The progress of the material is [blank_start]tracked[blank_end] by a [blank_start]detector[blank_end] above [blank_start]ground[blank_end]
4.) If there is a [blank_start]leak[blank_end], the radioactive material will [blank_start]escape[blank_end] and will be detected at the surface.
5.) If there is a [blank_start]blockage[blank_end], the radioactive material will stop flowing so it [blank_start]cannot[blank_end] be detected after this point.- Agamma
- Brays
- Cgamma
- Dgamma
- Etracked
- Fdetector
- Gground
- Hescape
- Ileak
- Jcannot
- Kblockage
33Tracers used to detect a tumour in the body:
1.) A radioactive [blank_start]map[blank_end] of the person's [blank_start]body[blank_end] is made
2.) A radioactive substance ( [blank_start]Beta[blank_end] or g[blank_start]amma[blank_end]) is [blank_start]injected[blank_end] into the person
3.) A second [blank_start]map[blank_end] of the persons [blank_start]body[blank_end] is made
4.) All [blank_start]count[blank_end] [blank_start]rates[blank_end] will have increased, but the area where the [blank_start]tumour[blank_end] is will have a significantly [blank_start]higher[blank_end] [blank_start]count[blank_end] rate as tumours require a lot of [blank_start]oxygen[blank_end] from the [blank_start]blood[blank_end] so a lot of [blank_start]blood[blank_end] will flow to the tumour.- Amap
- Bbody
- CBeta
- Damma
- Einjected
- Fmap
- Gbody
- Hcount
- Irates
- Jtumour
- Khigher
- Lcount
- Moxygen
- Nblood
- Oblood
34A [blank_start]medical[blank_end] tracer is a small amount of radioactive material which is put into a patient so that its progress through the body can be followed using a radioactive [blank_start]detector[blank_end] outside the body. It is important that the medical tracer has a [blank_start]short[blank_end] half-life so that patients don't [blank_start]irradiate[blank_end] other people and so that the patient doesn't remain [blank_start]radio[blank_end] [blank_start]active[blank_end] for long.
- Amedical
- Bdetector
- Cshort
- Dirradiate
- Eradio
- Factive
35[blank_start]Beta[blank_end] and g[blank_start]amma[blank_end] can be used as medical tracers as they pass through the [blank_start]skin[blank_end] whereas [blank_start]alpha[blank_end] does not.
- ABeta
- Bamma
- Cskin
- Dalpha
36Tracers can be used to find out how well the thyroid gland is working:
1.) Patient given a radioactive substance containing [blank_start]iodine[blank_end] - [blank_start]131[blank_end]. ( [blank_start]Iodine[blank_end] is [blank_start]absorbed[blank_end] in the [blank_start]thyroid[blank_end] [blank_start]gland[blank_end])
2.) Radiation can then be used to measure its progress and find out how well the [blank_start]thyroid[blank_end] [blank_start]gland[blank_end] is working by [blank_start]measuring[blank_end] the amount of [blank_start]iodine[blank_end] it [blank_start]absorbs[blank_end].- Aiodine
- B131
- CIodine
- Dabsorbed
- Ethyroid
- Fgland
- Gthyroid
- Hgland
- Imeasuring
- Jiodine
- Kabsorbs
37You can make a material radioactive by putting it in a [blank_start]nuclear[blank_end] [blank_start]reactor[blank_end] and allowing it to absorb extra [blank_start]neutrons[blank_end]. This makes its nucleus [blank_start]unstable[blank_end] so it emits [blank_start]radiation[blank_end].
- Anuclear
- Breactor
- Cneutrons
- Dunstable
- Eradiation
Informações
- Descrição
- GCSE Physics Quiz sobre P4, criado por Verity Cartwright em 05-03-2017.
- Autor
- Verity Cartwright
- Idioma
- English
- Visualizações
- 2
- Etiquetas
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