Physics P22, How was it!

[Silent Hunter]

in finding ratios ?

 

[Silent Hunter]

Electricity question was of 9 or 10 marks!!

can you recall ? questions per part ?

 

[alcoholic 111]

can you recall ? questions per part ?

first part I1 = I2 + I3 (1 marks)
second part was something to find current I guess (2 marks)
power ratio (3marks)
pd across CD (3 marks)

 

[BornVillain]

Electricity question was of 9 or 10 marks!!

which is sad really because i think im losing all of it..
listen for the second last question how did u find the power?
the resistors were in parallel which makes it half so the power is doubled yeah?

 

[BornVillain]

o

first part I1 = I2 + I3 (1 marks)
second part was something to find current I guess (2 marks)
power ratio (3marks)
pd across CD (3 marks)

mg are u sure its I1 = I2 + I3

 

[alcoholic 111]

which is sad really because i think im losing all of it..
listen for the second last question how did u find the power?
the resistors were in parallel which makes it half so the power is doubled yeah?

Use
P=V² / R

 

[BornVillain]

Use
P=V² / R

i forgot what i did but i kept in mind about the resistors thing... are u sure I1 = I2 + I3 ?
because that would be great.

 

[alcoholic 111]

i forgot what i did but i kept in mind about the resistors thing... are u sure I1 = I2 + I3 ?
because that would be great.

yes dude
sum of all current entering a node = sum of all current existing the node.

 

[BornVillain]

yes dude
sum of all current entering a node = sum of all current existing the node.

what if ure wrong because many people didnt write that?

 

[BornVillain]

yes dude
sum of all current entering a node = sum of all current existing the node.

and how did u find the current?????

 

[Silent Hunter]

and how did u find the current?????

determine the overall resistance and then use R = V/I .... that what id did if i remember correctly

 

[BornVillain]

determine the overall resistance and then use R = V/I .... that what id did if i remember correctly

and what about the extension question where they ask the change in energies on the mass..?

 

[alcoholic 111]

and what about the extension question where they ask the change in energies on the mass..?

Elastic potential energy (strain energy) >>>> Kinetic Energy >>>>> gravitational potential energy

 

[alcoholic 111]

what if ure wrong because many people didnt write that?

dude we didn't need to write this , this is kirchoff's first law just for explaination

 

[BornVillain]

Elastic potential energy (strain energy) >>>> Kinetic Energy >>>>> gravitational potential energy

i wrote about KE and GP not elastic. what was ur acceleration? i subtracted the 2 extensions and found the force as F=KE and then F=ma , you?

 

[geek101]

was anyone's resistance ratio 0.6??

 

[yashant]

many wrote alpha .. no ones sure

i think its gamma because only gamma have such high energy . Alpha has least (ie less tha 1 so alpha is probably wrong)

 

[yashant]

in finding ratios ?

3/5 or 5/3 something like that

 

[yashant]

first part I1 = I2 + I3 (1 marks)
second part was something to find current I guess (2 marks)
power ratio (3marks)
pd across CD (3 marks)

ratio = 3/5 ?

pd =3.2 ?

 

[alcoholic 111]

3:5 (or) 0.6