Kinematics - Motion Graphs

[Usman17]

Please no 28 of this mcq paper...
http://www.xtremepapers.me/CIE/Cambridg ... 7_qp_1.pdf
HOW :S

 

[Usman17]

Where'd u go!

 

[Usman17]

And please 1 final question!! Its of Nov o6 p2 B11 IN THE REDSPOTS...! That question isnt in the xtreme papers

 

[CaptainDanger]

Yes the same for Biology papers in Redspots too... Don't worry... Have concept about them... The answer to MCQ 28... You can see that question states that resistance increases as the current increases... As the resistance increases the current flow will stop increasing so the gradient of graph drops... Shown in B...

 

[abcde]

Please no 28 of this mcq paper...
http://www.xtremepapers.me/CIE/Cambridg ... 7_qp_1.pdf
HOW :S

The gradient of an I-V graph is inversely proportional to resistance since R = V/I . So look for the graph in which gradient decreases (resistance increases) as the current increases. Only the gradient of graph B is decreasing so B is correct.
You can also solve this question if you know the component in which the resistance increases as current increases. That component is a filament lamp so if you can remember what the I-V graph of a filament lamp looks like, you will choose B.

 

[Usman17]

I get itttttttttt.... Man it was so... lawl Thnx a bundle

 

[abcde]

You're welcome