ALL MEMBERS PLEASE HELP! Urgent!

[474474]

I have an exam soon and there's oemthing really basic I can't understand at all
I have a table with values in one column ranging from 0.47 to 1.13 and in another from 0.7 to 1.7 and I have to chose a scale to plot them on a graph of 75x60mm grid
I have no idea what the first number should be and how I should divide the markings

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s12_qp_61.pdf
Question 3(a)(ii)

 

[Slav Defence]

I have an exam soon and there's oemthing really basic I can't understand at all
I have a table with values in one column ranging from 0.47 to 1.13 and in another from 0.7 to 1.7 and I have to chose a scale to plot them on a graph of 75x60mm grid
I have no idea what the first number should be and how I should divide the markings

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s12_qp_61.pdf
Question 3(a)(ii)

i think that it depends upon the nature of unit...for example parabola curve,straight line etc so determine the nature of your unit first like the graph is b/w pressure volume,mass-volume,time-distance,velocity etc

 

[474474]

You can look at the question in the link, scroll to Page 7

i think that it depends upon the nature of unit...for example parabola curve,straight line etc so determine the nature of your unit first like the graph is b/w pressure volume,mass-volume,time-distance,velocity etc

It's either straight line or free hand, and the unit is Voltage y axis against Amperes x axis

 

[Slav Defence]

You can look at the question in the link, scroll to Page 7



It's either straight line or free hand, and the unit is Voltage y axis against Amperes x axis

straight line is recommended if i am not wrong....try to place values in such a way that u recieve a straight line graph.

 

[474474]

straight line is recommended if i am not wrong....try to place values in such a way that u recieve a straight line graph.

lol the main thing here is We Have To Decide the scale and I have no idea what to do, i mean how many units should each mm mark on the grid represent so we can fit all the values needed to be drawn

like is there any general formula to know how to mark the ranges of values on graphs to decide scale?

 

[Roybot]

Take any random scale it shouldn't matter.

 

[474474]

Take any random scale it shouldn't matter.

lol it should be perfect like the biggest number as close to the end and either 0 or the smallest number as close to the start - otherwise you get problems later on where you have to derive answer based on the graph you drew (not to mention there's usually marks for chosing the most accurate scale)

 

[Slav Defence]

lol it should be perfect like the biggest number as close to the end and either 0 or the smallest number as close to the start - otherwise you get problems later on where you have to derive answer based on the graph you drew (not to mention there's usually marks for chosing the most accurate scale)

here are few sample graphs which may help you to place small values:

I hope that this will help you to adjust your values for your graph scale....

 

[Roybot]

lol it should be perfect like the biggest number as close to the end and either 0 or the smallest number as close to the start - otherwise you get problems later on where you have to derive answer based on the graph you drew (not to mention there's usually marks for chosing the most accurate scale)

I don't see why you d face any problem. Its a linear equation, the gradient should be the resistance. No matter what quadrant your line is in, the gradient will be the same.

 

[Roybot]

 

[474474]

THanks a lot you took the effort to solve it, and used red ink

Just tell me how you decided the y axis should be 1V for 20 marks on the grid and x axis as 0.25 on every 10 marks? I mean is there a way for me to know how to do this in other questions with different ranges?
I simply have no idea how to decide the scale for each axes

here are few sample graphs which may help you to place small values:

I hope that this will help you to adjust your values for your graph scale....

THanks a lot but these scales are really easy compared to the more awkward one I get in my IGCSE past papers

 

[danger007]

THanks a lot you took the effort to solve it, and used red ink

Just tell me how you decided the y axis should be 1V for 20 marks on the grid and x axis as 0.25 on every 10 marks? I mean is there a way for me to know how to do this in other questions with different ranges?
I simply have no idea how to decide the scale for each axes



THanks a lot but these scales are really easy compared to the more awkward one I get in my IGCSE past papers

simply the maximum voltage is 2v... so you can divide 0.5v per unti(10marks as per you)... maximum current is 1.17Am.... so he took 025 A per unit... it depends on the graph size and your wish.... you can take 1V for 20 marks or 30marks... that depends upon... if you take more units, you will get neat graph.....

 

[Hashshāshīn]

There are 5 values to plot, so you can split it into 6 and plot. But it shouldn't matter.

 

[Yaduveer]

My take on Scale:

X-axis(I/V): (1.13-.47)/5*75=9.9mm for 1 unit=>We can use 5mm as 1 unit.
Y-Axis(V/V)1.7-.7)/10*60=6mm for 1 unit=> We can use 5 mm as 1 unit as matter of convenience.

 

[danger007]

I have an exam soon and there's oemthing really basic I can't understand at all
I have a table with values in one column ranging from 0.47 to 1.13 and in another from 0.7 to 1.7 and I have to chose a scale to plot them on a graph of 75x60mm grid
I have no idea what the first number should be and how I should divide the markings

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s12_qp_61.pdf
Question 3(a)(ii)

what you are studying bro?

My take on Scale:

X-axis(I/V): (1.13-.47)/5*75=9.9mm for 1 unit=>We can use 5mm as 1 unit.
Y-Axis(V/V)1.7-.7)/5*60=12mm for 1 unit=> We can use 10mm as 1 unit as matter of convenience.

he don't need to do that much work for simple problem... he might get confused....