Biology; Chemistry; Physics: Post your doubts here!

[convent2012]

Welcome Best of luck for tomorrow

thanks same to u ! do pray for me

 

[a.abid]

thanks same to u ! do pray for me

Thanks yeah sure Btw which convent r u from?

 

[luckywang]

how a reed switch operate as light-sensitive switch and temperature operated alarm?

someone help me on this?

 

[daredevil]

What will happen if Split rings are used in AC generator instead of Slip rings?

best case scinerio?? : U WILL GET FIRED FROM YOUR ENGINEERING JOB

 

[a.abid]

someone help me on this?

Can u try to elaborate ur question more? Its a bit confusing.

 

[asd]

someone help me on this?

attach a thermistor for temperature and LDR for light.

 

[kitecrystal]

anyone plz explain 29.

 

[a.abid]

best case scinerio?? : U WILL GET FIRED FROM YOUR ENGINEERING JOB

lol...Well split rings help in reversing the current, while slip rings help the generator to connect to the external environment,AC generator does not need any split rings cuz the current is already reversing,so it wont work...Thats wat I think :/

 

[luckywang]

Can u try to elaborate ur question more? Its a bit confusing.

describe and explain circuits operating as light-sensitive switches and temperature operated alarms(using a reed relay)
copy from syllabus...

 

[a.abid]

anyone plz explain 29.

The answer is 5 right as in C?This is because if u tryto see it clearly, 5 forms a series circuit.
0 cant be the option cuz theres no wire connecting it further to the bulb
Same is the case with 1 it has a dead end.6 cant be the option cuz for it the switch zero shud be closed.Thats wat I think :/

 

[a.abid]

describe and explain circuits operating as light-sensitive switches and temperature operated alarms(using a reed relay)
copy from syllabus...

Well that has a really really long answer :|

 

[kitecrystal]

The answer is 5 right as in C?This is because if u tryto see it clearly, 5 forms a series circuit.
0 cant be the option cuz theres no wire connecting it further to the bulb
Same is the case with 1 it has a dead end.6 cant be the option cuz for it the switch zero shud be closed.Thats wat I think :/

thanks a lot

 

[daredevil]

lol...Well split rings help in reversing the current, while slip rings help the generator to connect to the external environment,AC generator does not need any split rings cuz the current is already reversing,so it wont work...Thats wat I think :/

yup that is the right answer.

 

[Spidey21]

describe and explain circuits operating as light-sensitive switches and temperature operated alarms(using a reed relay)
copy from syllabus...

do you know how LDR and thermistor work??

 

[daredevil]

0.3x2=0.6n... then it will turn clockwise so answer is A!

but y wud QC b taken as the length. explain in detail plz bcuz i have gone through the other anwers but they are not to my satisfaction. u can say k meri SUI atak gaye hai iss baat pe. plz help!!! =/

 

[convent2012]

http://www.xtremepapers.com/papers/...nal O Level/Physics (5054)/5054_w11_qp_22.pdf
11 b i) 1 and 3
c ???

 

[convent2012]

http://www.xtremepapers.com/papers/...nal O Level/Physics (5054)/5054_w11_qp_22.pdf
q10 d ??

 

[convent2012]

relationship b/w resistance and current ??

 

[kitecrystal]

need help in 9,26,33,37,40.

 

[a.abid]

thanks a lot

Np