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Physics Paper 6 - A list of possible improvements to experiments

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dodi23:
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!!!

Fastal:
+rep
awesome:)

nid404:
Great work :)

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

Thanks :)

The Golden Girl =D:
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

Vin:
Great work .. i'll +rep u in an hour .. :)

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