AS PHY PRACTICAL 33

[skylexgale]

For the first two, yes, except youll write L1-L2 in the denominator for case 2. For the other 2, error is {0.1/L1+ 0.1/L2} multiplied by their product or quotient

Hope this helps

So for example if
L1 = 2
L2 = 3

For them being multiplied I will do

( 0.1/2 + 0.1/3 )* L1*L2

(* shows multiplied by)

and for divided

( 0.1/2 + 0.1/3 )* L1/L2


and for L1^4 (^ is raised to power)

(0.1/2)*4

 

[iFuz]

This is the graph for Rheostat (Variable Resistor) Right?

 

[aleezay]

So for example if
L1 = 2
L2 = 3

For them being multiplied I will do

( 0.1/2 + 0.1/3 )* L1*L2

(* shows multiplied by)

and for divided

( 0.1/2 + 0.1/3 )* L1/L2


and for L1^4 (^ is raised to power)

(0.1/2)*4

Yep

 

[Taha.Sajid]

If a question were to appear tommorow asking to calculate the percentage uncertinity in the distance D(the distance travelled by the marbal from the point where it is released to the point it comes to rest)
What would be the absolute error in this calculation?

 

[Malik777]

If a question were to appear tommorow asking to calculate the percentage uncertinity in the distance D(the distance travelled by the marbal from the point where it is released to the point it comes to rest)
What would be the absolute error in this calculation?

almost 0.2
cm

 

[iFuz]

This is the graph for Rheostat (Variable Resistor) Right?

and aint the guess same to w12 qp34, How can they give same experiments ?

 

[iFuz]

Here is link to basic I-V graphs of different electric components.
http://www.passmyexams.co.uk/GCSE/physics/ohms-law.html
Click Here.

 

[skylexgale]

Yep

Ah, thanks a lot. Best of luck tomorrow!

 

[Taha.Sajid]

almost 0.2
cm

How so ?

 

[skylexgale]

almost 0.2
cm

So when we find absolute uncertainty, we don't take into account the calculated value?
shouldn't it be 0.1/calculated-value ?

 

[Malik777]

So when we find absolute uncertainty, we don't take into account the calculated value?
shouldn't it be 0.1/calculated-value ?

How so ?

because We have To also consider the parallax error in it

 

[Malik777]

So when we find absolute uncertainty, we don't take into account the calculated value?
shouldn't it be 0.1/calculated-value ?

How so ?

The measurement of the actual length of the slope is likely to be to ± 0.5 mm although it is
very hard to accurately note when the object has actually travelled that exact distance. The
time measurement could be to about ±0.2 s, the relatively large uncertainty being due both to
the reaction time and to the difficulty in knowing exactly when the ball passes the mark on
the slope.

 

[Taha.Sajid]

The measurement of the actual length of the slope is likely to be to ± 0.5 mm although it is
very hard to accurately note when the object has actually travelled that exact distance. The
time measurement could be to about ±0.2 s, the relatively large uncertainty being due both to
the reaction time and to the difficulty in knowing exactly when the ball passes the mark on
the slope.

So in short,not only do we have to use the uncertainty values of any instruments used but also to add other sources of error such as reaction time etc...
And the answer would be a total sum of these errors.
i hope i am right :|

 

[razahayat777]

Malik777 copy/paste

 

[Malik777]

So in short,not only do we have to use the uncertainty values of any instruments used but also to add other sources of error such as reaction time etc...
And the answer would be a total sum of these errors.
i hope i am right :|

(Y)

 

[Malik777]

Malik777 copy/paste

source pls ?

 

[monoho]

Please answer my questions:

While using a voltmeter we have to take the polarity into consideration right?

How do i read a micrometer screw gauage

The ammeter has 3 places or things where we can connect the crocodile clips right? How do we connect an ammeter. As in which ones to use

Can we ask the invigilators about the setting of an ammeter like whether we have to set it to 10 mA or whatever without getting marks cut?

 

[sodiumchloride]

How???/

Hey! I know How to calculate % uncertainty, yet I don't know About calculating absolute uncertainty :/

 

[adithya909]

Apologies 34 *. And I just leaked you guys the paper -__-
No one`s thankful here

thanks bro ... my sources say the same too....... but then they resemble o/n 2012 34 .... i think there are modifications .... but then the faults and improvements will be the same (95%).......

 

[Machikne]

how do i set up a rheostat...it has 3 connection points...which ones do i use..