physics paper-6

[KareemXPF]

what is d triangle method of calculating gradient?
w10 p6 ques 3 a , how do we get d gradient as 1.15???
Pls reply!!!!
Urgent!!! :%)

y2-y1/x2-x1

 

[KareemXPF]

in physics p61 w10,
ques 4 a states that we hve to extend the line EF till it meets AB, so should the line continue straight or should it bend at CD????
Pls help!!!
I'm weak at physics
Pls!!

No it shouldn't bend at CD. In drawing questions you follow his instructions. Unless stated otherwise.

Noooo... you must just extend it !
no bending
and then the 2 lines cross
Measure the smallest angle
Good luck all

 

[KareemXPF]

can anyone please solve question 1 of this paper.... http://www.xtremepapers.me/CIE/Cambridge IGCSE/0625 - Physics/0625_w06_qp_6.pdf

a) you measure the length with your ruler
b)basically the rope was wound up around it 5 times and the start and the end were marked. then the rope was unwinded and the distance between the marks were measured. So the rope covered the circumference of the bundle 5 times. So you just need to divide by 5 to get the circumference.
Second part , you just sub values in the equation.

c) i) this one's a bit tricky , but basically you needed to realize that you couldn't calculate the air with any degree of accuracy and therefore you should have just given the original volume to less significant figures to indicate lack of accuracy. It's a pretty messy question but oh well.
The second part is straightforward. Even if you don't have the right value of part i) , you should still attempt it with any value as you get marks for the work.

About (c)
I asked my teacher.. he said that the air gaps are 5-10% of the total volume
So just find the value for a 5 or 10 % and subtract it with the total volume
I hope i helped you

Actually , no. The examiner's report says and i quote.

Few candidates scored the mark for the estimate. They were expected to realize that the volume of air could not be calculated with accuracy and therefore to give their answer to one or two significant figures. Many gave an answer that bore no relation to the volume calculated in b) ii and , even those who suggested an answer within the tolerance allowed, gave three significant figures. Estimation of answers is a very useful skill to learn during the course.

Your teacher either didin't understand the question or giving bad advice. As the volume of air indeed can not be calculated.[/quote]

Im sorry but im sure 100% that the air gaps take 5-10% of the total volume
You can also check the marking scheme
Just check and tell me
good luck

 

[SweetSomebody]

Well i took a long time to solve this question,,
1st.. the mark will be given for 2 points
the calculation [1] and the answer [1]
the question says .. current will be 0.5 I. ( means the current will be half the value of I 0 .. which is 0.3 ohm.. in figure 3.2. ) if the total resistance in the circuit is twice the resistance of X

1. 0.5 x 0.3 = 0.15 Amps
2. If you look at the table at the top of the page .. you will find that when current is 0.15.. the resistance will be 10.1 or 10 ohms..
Therefore the answer is 10 Ω

I hope i answered well and you understood

but shouldnt the value of X be 5 as it was mentioned that the current will be 0.5 I0 when the total resistance is double that of X??

No because when the value of the current was 0.5. there were 2 resistors and the X resistor. and we know that when the current = 0.5 , the total resistance = 2x. since x is there already , the resistance of the other 2 must be equal to x as well.

ahaaaaaaaaaaaa ok thnx i get it now

btw do u know an experiment to show that a force acts on a current carrying conductor in a magnetic feild??
also i need an explanation for the dc motor asap
thnx in advance

 

[KareemXPF]

About the current carrying conductor..
You dont need an expirement
Just put a wire between to magnets .. it will move

And about the dc motor :
viewtopic.php?f=24&t=7474

 

[unplugged]

what is d triangle method of calculating gradient?
w10 p6 ques 3 a , how do we get d gradient as 1.15???
Pls reply!!!!
Urgent!!! :%)

Not the same question but a gradiant question non the less. As you can see you just project a line perpendicular to the x-axis from the line in the graph and make it somewhat long and then project a line from the end of it perpendicular to the Y-axis till it intersects the line in the graph.
And then you divide the difference in Y over the difference in x. G = Y2 - Y1 / X2 - X1.

 

[gary221]

Thnx guys u all a great help!!!!! :Rose:
All d best :good:
hope d paper is easy

 

[unplugged]

Im sorry but im sure 100% that the air gaps take 5-10% of the total volume
You can also check the marking scheme
Just check and tell me
good luck

The mark scheme is referring to the 10% of experimental accuracy , this basically states that readings can differ by +-10% due to being influenced by conditions unaccounted for. Has absolutely nothing to do with the actual volume of the air.

 

[KareemXPF]

I hope to
Good luck everyone
Just pray and everything is fine

 

[SweetSomebody]

does anyone know what r bistable circuits??

 

[KareemXPF]

Does it have a relation with logic gates?
Which past paper is mentioned bistable circuits?
I never saw it
If it is in a past paper;.. get me the link

 

[SweetSomebody]

actually its not mentioned un any of the past papers.. i saw it in my book bujt i dont get a word from that whole thing!!

 

[KareemXPF]

Ignore it
Not in the syllabus

 

[unplugged]

does anyone know what r bistable circuits??

It refers to a circuit that can be in two states but cannot trigger the change between the two states itself.
For example a circuit with two light bulbs and one of the light bulbs is controlled by a switch. The circuit can be running with one light bulb on or two and the state it is in is controlled by an outside influence.


(electronics) A circuit with two stable states such that the transition between the states cannot be accomplished by self-triggering.
Definition fro answers.com

 

[KareemXPF]

does anyone know what r bistable circuits??

It refers to a circuit that can be in two states but cannot trigger the change between the two states itself.
For example a circuit with two light bulbs and one of the light bulbs is controlled by a switch. The circuit can be running with one light bulb on or two and the state it is in is controlled by an outside influence.


(electronics) A circuit with two stable states such that the transition between the states cannot be accomplished by self-triggering.
Definition fro answers.com

Just dont fill your minds by useless things
These informations arent needed
Not in the syllabus
and never asked

 

[SweetSomebody]

does anyone know what r bistable circuits??

It refers to a circuit that can be in two states but cannot trigger the change between the two states itself.
For example a circuit with two light bulbs and one of the light bulbs is controlled by a switch. The circuit can be running with one light bulb on or two and the state it is in is controlled by an outside influence.


(electronics) A circuit with two stable states such that the transition between the states cannot be accomplished by self-triggering.
Definition fro answers.com

huh???? is that even english??!! isnt there any simple explantion?? cos that sounds like greek to me!! :shock:
thnx alot anyway

Ignore it
Not in the syllabus

i hope ur right

 

[unplugged]

does anyone know what r bistable circuits??

It refers to a circuit that can be in two states but cannot trigger the change between the two states itself.
For example a circuit with two light bulbs and one of the light bulbs is controlled by a switch. The circuit can be running with one light bulb on or two and the state it is in is controlled by an outside influence.


(electronics) A circuit with two stable states such that the transition between the states cannot be accomplished by self-triggering.
Definition fro answers.com

Just dont fill your minds by useless things
These informations arent needed
Not in the syllabus
and never asked

Well , that's quite a bad example of learning simply to pass the exam. Understanding tangents to a subject can help strengthen your understanding and in the end might make you score higher. It's a sad state when education is about passing useless exams instead of acquiring life skills.

 

[unplugged]

huh???? is that even english??!! isnt there any simple explantion?? cos that sounds like greek to me!! :shock:
thnx alot anyway

It's quite simple actually. You can define a stable state as a state that will persist if left alone. Like a lamp in a simple circuit will stay on normally. Now when there are switches in the circuit , the circuit can be on but the state of the components will vary. In the case of bi-stable there can be two states that can exist and will persist if left alone.

Like lamp 1 : on lamp 2 on
Lamp 1 : on lamp 2: off

 

[gary221]

Hi
How do u calculate the rise in temp change of water?
(june 2004 q 5 b)
is there some formula ?? :%)
Pls help, guys
Is d formula loss in temp of ice= gain in temp of water related to this?
if yes, how do we apply this???
PLS... help!
Urgent!!

 

[gary221]

guys, pls help!!
I'm going to give my exams after 7 hrs only!!!!
Pls!!!!!