Physics paper 34

[AppleGreen]

how many sig fig shud we use for the data in question 2? the calculation part to get processed data

 

[leosco1995]

how many sig fig shud we use for the data in question 2? the calculation part to get processed data

You mean when calculating the values of k?

 

[AppleGreen]

nope when doing calculation, eg. calculate R from V and I obtained in exp?

 

[leosco1995]

nope when doing calculation, eg. calculate R from V and I obtained in exp?

Oh, well it depends on your raw data and instruments, mostly. If none are given, then you usually use 2 or 3.

 

[AppleGreen]

if one of the raw data is 2, another is 3?

 

[toirneach07]

yeah I mean a clip, sry for my bad english. because I have my cousin, who is a Physics teacher, he told me that the first question is about acceleration of a trolley, roughly like a ticker tape that we studied, and the 2nd question is about torque and moment. He also hints me that the paper this year thought the content seems to be simple but the types of questions they ask are very different from previous years.
That is if we are talking about paper 34

R u sure abt tht???
Coz my teacher was telling me tht the 1st ques will be abt electricity, n d 2nd abt oscillations or sth...

 

[Iadmireblue]

Yeap many people are saying that we have electricity
my guesses are 1 question potentiometer,becuase my teacher said that it was important and 2nd questions something to do with oscillations or equilibrium or something like that.

 

[toirneach07]

Yeap many people are saying that we have electricity
my guesses are 1 question potentiometer,becuase my teacher said that it was important and 2nd questions something to do with oscillations or equilibrium or something like that.

Same here!!

 

[confused123]

justify the number of signioficant figures. how to answer this one.

one example involving this question: soem water is given in bottle, we need to measure its volume using beaker or measuring cylinder, suppose the volume reading is 500 cm cube. now in next part he asks that justify the sg..? :/

 

[toirneach07]

justify the number of signioficant figures. how to answer this one.

one example involving this question: soem water is given in bottle, we need to measure its volume using beaker or measuring cylinder, suppose the volume reading is 500 cm cube. now in next part he asks that justify the sg..? :/

Umm..maybe it depends on the least count of instrument used...
like the calibrations n everyth???

 

[Iadmireblue]

usually you give the same no of sig fig as the one already given somewhere in the question

 

[confused123]

Umm..maybe it depends on the least count of instrument used...
like the calibrations n everyth???

i guess so like to how much degree or accuracy the instrument measures. that will determine the s.f

do you know how to take log in some of questions in practical...? :/

 

[confused123]

usually you give the same no of sig fig as the one already given somewhere in the question

what if its the 1st question, like u take one reading and next part asks straight away why did u took these number of s.f for the reading

 

[toirneach07]

usually you give the same no of sig fig as the one already given somewhere in the question

Yes, bt v can also say tht this is d l.c. of d instrument...so this will b d ans, right???

 

[AppleGreen]

justify the number of signioficant figures. how to answer this one.

one example involving this question: soem water is given in bottle, we need to measure its volume using beaker or measuring cylinder, suppose the volume reading is 500 cm cube. now in next part he asks that justify the sg..? :/

u can never use beaker to measure. if smallest division on m.cylinder is 0.1 then ur measurement shud have 2 or 3 s.f

 

[toirneach07]

i guess so like to how much degree or accuracy the instrument measures. that will determine the s.f

do you know how to take log in some of questions in practical...? :/

Yup..thts wht i think!

 

[leosco1995]

if one of the raw data is 2, another is 3?

Then you take the one with the lower precision, so 2. But I think 3 would also be acceptable based on some marking scheme I read.

 

[toirneach07]

For log u can use the 'log' function in ur calci!

 

[zzaaiinn]

Can any one tell is there any question about potentiometer?

 

[logophile]

One, no potentiometer.. Don't worry
Two, make sure you guys know how to measure diameter using a micrometer screw gauge..

And does anyone of you know what the uncertainty of a stopwatch is ? :s