Physics paper 34

[Asad Bin Saeed]

is it something to do with resistance :O

X and Y must be resistors....fixed resistors.

 

[Iadmireblue]

so resistors of 680 ohms and 330 ohms?

 

[reza110]

is it something to do with resistance :O

it seems that x and y are fixed resistors..

 

[ibadsiddiqi]

so resistors of 680 ohms and 330 ohms?

probably yes..

 

[anonymous123]

Hi...just a small question. When you are measuring the emf of a battery you simply set the multimeter to 20V in voltage mode and connect it with the battery ryt?

 

[Iadmireblue]

any idea on what kind of question they may be asking for tmrow?

 

[raamish]

hmm guys need help in significant figures:

my readings are:
V/V:8.0 V
I/A:0.32
P/W:2.56
R/ohm:25.0
R4/ohm: 3.9*10^5

Guys please check my readings and tell me how many significant figures i should give for each reading

 

[Iadmireblue]

ANswers ​

 

[anonymous123]

Hi...just a small question. When you are measuring the emf of a battery you simply set the multimeter to 20V in voltage mode and connect it with the battery ryt?

I repeat Plz help me sm1

 

[raamish]

A4 size imafe of 18 whats dis :O??

 

[Asad Bin Saeed]

I repeat Plz help me sm1

yes its ryt...you dont need to worry the assistants will hav fixed it to required value...usually when doing practicals in our labs the lab assistants suggest us to make it on 20 v...they'll guide you its not complicated...

 

[Iadmireblue]

A4 size imafe of 18 whats dis :O??

maybe he means image

 

[raamish]

well what dies a4 size image of 18 means?

 

[raamish]

itz most probably a cell with an e.m.f of 18 V

hmm guys need help in significant figures:

my readings are:
V/V:8.0 V
I/A:0.32
P/W:2.56
R/ohm:25.0
R4/ohm: 3.9*10^5

Guys please check my readings and tell me how many significant figures i should give for each reading​

can u help me plzzz this is really bothering me

 

[[D]UNK]

It's really not fair the other group 33 get an easy paper and didn't have electricity while we did

dude any paper 33 dosent electricity

 

[MISHEAL]

dude any paper 33 dosent electricity

wow! i didnt understand a word u said

 

[Asad Bin Saeed]

hey when asked to justify that relation often given...I know a method K2-K1/K2+K1/2*100
but what ....when i get <10% the relation is justified or..... what the hell is with it anyone knows it pls reply me ASAP... :s

 

[Asad Bin Saeed]

hey when asked to justify that relation often given...I know a method K2-K1/K2+K1/2*100
but what ....when i get <10% the relation is justified or..... what the hell is with it anyone knows it pls reply me ASAP... :s

oooh sorry i got it just as i posted it in the next thread ...

 

[Mad-Eye]

for one help they cut 1 mark and for excessive help 2

What counts as excessive and what counts as minor?

 

[donorsolutions]

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

We wrote the volume of water to the same s.f (3) as given in the measuring cylinder i.e 3 s.f