Author Topic: Physics Paper 6 - A list of possible improvements to experiments  (Read 6549 times)

Offline dodi23

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Minimising heating effect of a current:
•   Lower current
•   Lower voltage
•   Add a lamp
•   Increase resistance of a resistor

To increase accuracy of ray diagrams
•   View bases of pins since pins may not be vertical
•   Keep pins further apart
•   Use more pins
•   Avoid parallax, explain action and reason
•   Repeats and average

Adjustments made to experiments will be made to increase accuracy

Improvement made to experiments about heating effect and insulation
•   Lids
•   Repeats
•   Stirring
•   Record max. Temperature
•   Add insulation
•   Keep constant room temperature
•   Avoid heat loss

How to check if a rule is vertical:
•   Protractor
•   Use of set square
•   Plumb line
•       Spirit Level  

Precautions taken in experiments about formation of images by a lens
•   Use a darkened area
•   Meter ruler on bench or clamped
•   Object and lens same height on bench
•   Mark on lens holder to show centre of lens
•   Take more readings
•   Avoid parallax error, explain action and reason
•   Lens\screen perpendicular to bench

Variables in experiments about springs and stretching effect:
•   Number of coils
•   Length of spring
•   Diameter\thickness of spring or wire
•   Range of loads
•   Length of wire
•   Coil spring

Periodic time (T) is measured by timing a number (n) of oscillations, then divide (n) by the time taken.

Drawing graphs:
•   Label axis
•   Choose a proper scale
•   Well judged best fit line
•   Thin and neat lines

Measuring the gradient:
•   Draw a triangle on graph
•   Use clear lines
•   Triangle must be larger than half the line

Sources of error in calculating circumference by string method:
•   Parallax
•   Diagonal winding
•   Thickness of string

Improvement made to calculating circumference by sting method
•   Avoid parallax error
•   Repeats and average
•   Thinner string
•   Parallel winding of springs
hope this helps... ;)
best of luck!!!
« Last Edit: May 13, 2011, 12:55:19 pm by Ari Ben Canaan »
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Offline Fastal

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Re: AMAZING PHYSICS P6 POINTS 2 B KNOWN BE4 THE EXAM!!!!
« Reply #1 on: May 10, 2010, 06:01:32 pm »
+rep
awesome:)

nid404

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Re: AMAZING PHYSICS P6 POINTS 2 B KNOWN BE4 THE EXAM!!!!
« Reply #2 on: May 10, 2010, 06:02:41 pm »
Great work :)

We had someone who posted this last year...but i couldn't find it

Thanks :)


Offline The Golden Girl =D

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Re: AMAZING PHYSICS P6 POINTS 2 B KNOWN BE4 THE EXAM!!!!
« Reply #3 on: May 10, 2010, 06:03:03 pm »
thx alot !!!! ..god bless u !!! ..

ummm srry but i didn't get the gradient part !! ....my teacher said  rise/ run......can u plz explain ur way?


thx in advance
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Offline Vin

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Re: AMAZING PHYSICS P6 POINTS 2 B KNOWN BE4 THE EXAM!!!!
« Reply #4 on: May 10, 2010, 06:05:48 pm »
Great work .. i'll +rep u in an hour .. :)

Offline dodi23

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Re: AMAZING PHYSICS P6 POINTS 2 B KNOWN BE4 THE EXAM!!!!
« Reply #5 on: May 10, 2010, 06:06:58 pm »
nytime ;)
i didnt copy it, i wrote it.

the golden girl:
find two points in the line, connect them in a triagle
then measure
(x1,y1) (x2,y2)
gradient=(y2-y1)\(x2-x1)
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Offline The Golden Girl =D

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Re: AMAZING PHYSICS P6 POINTS 2 B KNOWN BE4 THE EXAM!!!!
« Reply #6 on: May 10, 2010, 06:09:49 pm »
nytime ;)
i didnt copy it, i wrote it.

the golden girl:
find two points in the line, connect them in a triagle
then measure
(x1,y1) (x2,y2)
gradient=(y2-y1)\(x2-x1)

ohh so it's in the mathematical way , k ...now i get it :P ..lol
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Offline TheLonelyIsland

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Re: AMAZING PHYSICS P6 POINTS 2 B KNOWN BE4 THE EXAM!!!!
« Reply #7 on: May 10, 2010, 06:12:27 pm »
All hail queen Dodi23!!!!!!!!!!!!!

Offline Baladya

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Re: AMAZING PHYSICS P6 POINTS 2 B KNOWN BE4 THE EXAM!!!!
« Reply #8 on: May 10, 2010, 06:16:49 pm »
Heey Thanks for that. Many people kept asking for that :D
Hope u make for other papers too :)
Looks like i ran out of cool signatures :|

Offline abody158

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Re: AMAZING PHYSICS P6 POINTS 2 B KNOWN BE4 THE EXAM!!!!
« Reply #9 on: May 10, 2010, 06:28:57 pm »
thanksssssssssssssssssssssssssssssssssssssssssssssssssssss

helped alot  8)

Offline DrEvil

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Re: AMAZING PHYSICS P6 POINTS 2 B KNOWN BE4 THE EXAM!!!!
« Reply #10 on: May 10, 2010, 06:53:43 pm »
Thanks


+rep  ;D


“When choosing between two evils, I always like to try the one I've never tried before.”

Offline dodi23

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Re: AMAZING PHYSICS P6 POINTS 2 B KNOWN BE4 THE EXAM!!!!
« Reply #11 on: May 10, 2010, 08:26:57 pm »
welcome all :D
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Offline dsiddiqi11

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Re: AMAZING PHYSICS P6 POINTS 2 B KNOWN BE4 THE EXAM!!!!
« Reply #12 on: May 10, 2010, 09:16:59 pm »
hey for the image formed by lens, is keeping eye perpendicular to scale correct???

Offline Syed Kazim

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Re: AMAZING PHYSICS P6 POINTS 2 B KNOWN BE4 THE EXAM!!!!
« Reply #13 on: May 10, 2010, 11:54:07 pm »
Thanks a lot! +rep
--Les intellectuels de résoudre les problèmes, les génies les préviennent.

Offline Ivo

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Re: AMAZING PHYSICS P6 POINTS 2 B KNOWN BE4 THE EXAM!!!!
« Reply #14 on: May 11, 2010, 12:03:11 am »
To increase accuracy of ray diagrams
•   Avoid parallax, explain action and reason

How do you explain action, e.g.?  For example, in a question they ask: "State and explain the reason for one precaution that you took to gain an accurate result".

How would I explain about parallax?

I know about the other one, say look at bases of pins because they may not be vertical.

Always willing to help!  8)
"In helping others, we shall help ourselves, for whatever good we give out completes the circle and comes back to us."