Biology; Chemistry; Physics: Post your doubts here!

[funky brat]

Oh yeah, D is illogical.

What's the purpose of adding the capacitor to the circuit then?

 

[Dark Destination]

What's the purpose of adding the capacitor to the circuit then?

Who said the Capacitor stores charge? What is charge? You mean they store electrons?

 

[funky brat]

Who said the Capacitor stores charge? What is charge? You mean they store electrons?

Capacitor is a device to store charge. -.- Isn't it?
They store both positive charge and negative charge.

 

[funky brat]

Its simple. Relate it to the flow of current in a circuit. Current will flow from X to plate 1, and then from plate 2 to Y
Direction of the flow of electrons in opposite to the flow of current

So no charge will be stored in the capacitor?

 

[robinhoodmustafa]

But if it attracts the electrons the electrons will flow back to the positive terminal of the battery. Then how would the charge be stored?

Current has to flow in the closed circuit if it doesnt than the circuit will heat up.
Electrons (Current) passes through the capacitor.. The capacitor takes its share of electrons to charge its battery and give the rest of the electrons back to the power supply.
Capacitor wont store all the electrons send-ed from the power supply.... It basic thing to think about!

 

[Dark Destination]

Capacitor is a device to store charge. -.- Isn't it?
They store both positive charge and negative charge.

Charge = Electrons.

 

[funky brat]

Electron flow is opposite to flow of conventional current.Therefore they will move to plate 2.Here they will accumulate and then will be slowly discharged when the charge is large enough like in the case of lightening.Then they will return to the battery.My opinion.

They don't mention dicharge anywhere.
It just states 'Along which paths do electrons flow as the capacitor starts to charge?'

 

[Dark Destination]

They don't mention dicharge anywhere.
It just states 'Along which paths do electrons flow as the capacitor starts to charge?'

One things for sure. The capacitor can't suck up all the electrons, so the answer can not be D. That leaves only C as the right answer.

 

[funky brat]

Current has to flow in the closed circuit if it doesnt than the circuit will heat up.
Electrons (Current) passes through the capacitor.. The capacitor takes its share of electrons to charge its battery and give the rest of the electrons back to the power supply.
Capacitor wont store all the electrons send-ed from the power supply.... It basic thing to think about!

I got it. Thank you everyone.

 

[Awesome12]

The marking scheme's first point is
'Boil and then cool the milk'
What is the purpose of this?

 

[funky brat]

The marking scheme's first point is
'Boil and then cool the milk'
What is the purpose of this?

View attachment 40126

It's like pasteurization, to kill the pathogens that are disease causing and might be present in the milk. And cooling down after heating is the part of the process.

 

[Awesome12]

It's like pasteurization, to kill the pathogens that are disease causing and might be present in the milk. And cooling down after heating is the part of the process.

Thanks

 

[asadalam]

The marking scheme's first point is
'Boil and then cool the milk'
What is the purpose of this?

View attachment 40126

Is this from ATP?Which year?

 

[princess sofia]

Current has to flow in the closed circuit if it doesnt than the circuit will heat up.
Electrons (Current) passes through the capacitor.. The capacitor takes its share of electrons to charge its battery and give the rest of the electrons back to the power supply.
Capacitor wont store all the electrons send-ed from the power supply.... It basic thing to think about!

i dont thnk so cze there is an insulating layer between both the plates and no charge cn pass through thm
wt actully happens is dat the electrons frm the plate 2 are attracted by positive terminal of the battery and hence gains a positive charge whereas , the negative terminal repels electrons which thn accumulate on plate 1 giving it negative charge
thx difference in charge is the reason why we say dat capaciter stores charge

 

[princess sofia]

how r fungi , bacteria and viruses adapted to their envoirnment ?
sme1 plz answer cnt find it in book

 

[FLRNAB]

Can anyone explain the logic for the mixture part?
I know that Mg will produce more H2 than Zn given mass is same.

 

[DaniyalK]

The re activity goes like this: Magnesium > mixture > Zinc.
From the reactivity series, we know that magnesium is more reactive than zinc. This means that if we take equal masses of the mixture and pure zinc, the mixture will be more reactive, since it contains some magnesium,which is higher in the series than zinc. However, the mixture is not as reactive as pure magnesium, because it contains zinc, which holds its reactivity back.

 

[princess Anu]

When drawing lines of best fit, candidates should consider the position of all points. If the trend is linear, simply joining the first and last points on the line does not usually give the line of best fit. If the trend is curved, joining adjacent points does not usually give a smooth curve.
can somebody explain?

 

[Faizan Muhammmad]

When drawing lines of best fit, candidates should consider the position of all points. If the trend is linear, simply joining the first and last points on the line does not usually give the line of best fit. If the trend is curved, joining adjacent points does not usually give a smooth curve.
can somebody explain?

our objective is to find a pattern
either stuff is linear so it will be a straight line but due to experimental inaccuracies not all points will fall on the line
or it isnt and it follows a curve so we need to make a smoothly sloping line passing as close to the points as possible

 

[exploded diper]

our objective is to find a pattern
either stuff is linear so it will be a straight line but due to experimental inaccuracies not all points will fall on the line
or it isnt and it follows a curve so we need to make a smoothly sloping line passing as close to the points as possible

is it correct to make a line that does not pass through the last point?