ALL PHYSICS DOUBTS - POST HERE !!

[big mac]

This question has been killing me for a while, I really suck when it comes to this stuff.

1) May/June 2006 = Question 3:
    http://www.freeexampapers.us/IGCSE/Physics/CIE/2006%20Jun/0625_s06_qp_6.pdf

You don't need to give me accurate measurements when they ask, just draw the thing.

Here is the same kind of thing:
2) http://www.freeexampapers.us/IGCSE/Physics/CIE/2006%20Jun/0625_s06_qp_6.pdf
    Question 4.

I prefer you do the second one, it's more complicated, you can draw the diagram on paint, thank you!!

[Baladya]

A cookie for the one who answers my questions  

To which pole does the plotting compass's arrow point?
I also can't manage to understand diff between a potential divider and potentiometer. With pics plz

Who wants a cookie   ?

[red_911]

Although T is dropping as M does, the interval between the consecutive Ts are not the same.
To be proportional, there needs to be drop by a constant value, K. A set interval.
here, however, it first shows a deep drop from 0.9 to 0.78. Then 0.73 a short drop to 0.63.
the intervals have to be a fixed ratio.

True, I'm confused of why the mark scheme mentioned T/m. :S

Oh yes. To be directly proportional... the ratio also has to be increasing.
i.e T/m should also increase as m does. I think. :S

to be directly propotional the ratio has to be increasing or decreasing in a ratio ...anywayz thanks .. lets hope that someone else helps us on june 2005 question 4(c)    

[xMilishax]

How do you use a screw gauge? Can anybody please explain.

Thanks in advance.  

[Baladya]

This question has been killing me for a while, I really suck when it comes to this stuff.

1) May/June 2006 = Question 3:
    http://www.freeexampapers.us/IGCSE/Physics/CIE/2006%20Jun/0625_s06_qp_6.pdf

You don't need to give me accurate measurements when they ask, just draw the thing.

Here is the same kind of thing:
2) http://www.freeexampapers.us/IGCSE/Physics/CIE/2006%20Jun/0625_s06_qp_6.pdf
    Question 4.

I prefer you do the second one, it's more complicated, you can draw the diagram on paint, thank you!!

For the second one... do u mean question 5? cuz 4 doesnt have a question of drawing

[Airhead]

I also can't manage to understand diff between a potential divider and potentiometer.

I think they're pretty much the same thing. The only difference is that the potentiometer is an application of a potential divider

[xMilishax]

A cookie for the one who answers my questions  

To which pole does the plotting compass's arrow point?
I also can't manage to understand diff between a potential divider and potentiometer. With pics plz

Who wants a cookie   ?

It points towards north pole.

[big mac]

For the second one... do u mean question 5? cuz 4 doesnt have a question of drawing

yeah yeah sorry lol.

[Vin]

This question has been killing me for a while, I really suck when it comes to this stuff.

1) May/June 2006 = Question 3:
    http://www.freeexampapers.us/IGCSE/Physics/CIE/2006%20Jun/0625_s06_qp_6.pdf

You don't need to give me accurate measurements when they ask, just draw the thing.

here ..

[Baladya]

How do you use a screw gauge? Can anybody please explain.

Thanks in advance.  

Make sure it closes completely and the scale is 0 when its closed. Open the jaws, and put the object, close it. A scale on the barrel (scale next to jaw) shows the thickness in millimeters. Lets say the object has a thickness of 5.82. The scale on the barrel will show 5.5 and a lil bit. To know this lil bit, u have another scale on the thimble (the one next to barrel) this will tell u to add a certain amount to the 5.5. In this case it will show 0.32. U already have 5.5, now just add 0.38 to it and u will have 5.82
If u dont understand tell me...

[Mathewness]

4+1.978=5.978 aprox. 6 .... resistance of wire ab and ac is added ...

Thanks man.
General question about resistance wires; what are they exactly? And how would we draw them in a circuit?
For example how would we draw two resistance wires?

[Shazizzzle]

I think they're pretty much the same thing. The only difference is that the potentiometer is an application of a potential divider

A potential divider is when you have two resistors in a circuit, and the one with the higher resistance, has the higher p.d across it.

A potentiometer is a component yo use, usually like a rheostat, with a slider across a resistor, that varies the p.d across what's connecter to the slider. i.e full voltage, no resistance.
Full resistance, no voltage.

[red_911]

here ..

its wrong ..see the question again ... the line IJ should be inside the block

[red_911]

Thanks man.
General question about resistance wires; what are they exactly? And how would we draw them in a circuit?
For example how would we draw two resistance wires?

draw a wire and a resistor on it ,,, i mean a rectangular block ( the symbol of a resistor) 

[Baladya]

yeah yeah sorry lol.

Here u go