Physics P1 and P2 Discussions

[Mohammad Farzanullah]

Voltage decrease as when light shines on LDR its resistance decreases.

Shukar sahi hogaya!

 

[tayyabaaijaz]

what was the answer to last mcq? geiger marsden experiment? I did C.
and pressure was greatest in which of the beakers that contained water?
what was the danger to the appliances?
rubbing the rod one? it was D? rubbing polythene rod with wollen duster wala option na?
and in p2 what was the range of resistance?

 

[Mohammad Farzanullah]

what was the answer to last mcq? geiger marsden experiment? I did C.
and pressure was greatest in which of the beakers that contained water?
what was the danger to the appliances?
rubbing the rod one? it was D? rubbing polythene rod with wollen duster wala option na?
and in p2 what was the range of resistance?

40 was D
pressure was greatest at C (greatest depth)
overheating of socket
polythene one was D
range was 2-12V!

 

[Shadow]

11) no i am asking mine is wrong cox alpha contain positive charge and nucleus on contains protons?
12) correct
20) correct
22) correct
26) correct

Thats wat m saying. Aplha is positively charged while nucleus is also positively charged. So both shud have repelled each other. But they were passing straight so nucleus was small

 

[Shadow]

Voltage decrease as when light shines on LDR its resistance decreases.

Phew ! Got it correct

 

[Alina zahoor]

The extension one in p2 n broken filament one in p1 were the most tricky for me.... otherwise paper went good!!

What was your value of workdone in p2 the extention part question??

 

[Shadow]

Well, that's what it means.

Maybe u guys r ryt, mothing can b said for sure

 

[Alina zahoor]

40 was D
pressure was greatest at C (greatest depth)
overheating of socket
polythene one was D
range was 2-12V!

What was the answer to workdone in p2 the extention part?

 

[Alina zahoor]

w

Phew ! Got it correct

what was your value of workdone in p2 the extention part a ?

 

[Shadow]

What was your value of workdone in p2 the extention part question??

Dun remember. But i multiplied 90 with the length. Not to forget that length had to b converted to meters as well

 

[Alina zahoor]

Dun remember. But i multiplied 90 with the length. Not to forget that length had to b converted to meters as well

But 90 newton was average force!! but i took mean distance too and multiplied it with 90!!

 

[Shadow]

But 90 newton was average force!!

Yea i know. There had to b a reason y it was told

 

[Alina zahoor]

Yea i know. There had to b a reason y it was told

the average force given was 90 newton.. simply i took average of the distance and converted it into metres and multiplied it.. wouldnt it be ryt??

 

[Shadow]

But 90 newton was average force!! but i took mean distance too and multiplied it with 90!!

Cant say for sure, but if that much working was required, question shud have been worth more than 2 marks

 

[Zuhsid]

What was your value of workdone in p2 the extention part question??

27J

 

[Shadow]

27J

Multiplied length with 90, ryt?

 

[ritx]

d

Multiplied length with 90, ryt?

did u get this '27J' value too?

 

[Zuhsid]

Multiplied length with 90, ryt?

Yes....

 

[Naveedrehman10]

IN THE PRESSURE WALA MCQ.. THE HEAT WAS APPLIED FROM THE BOTTOM. THE PARTICLES WILL GAIN MORE KINETIC ENERGY, HENCE THEY WILL MOVE VERY FAST. EXERTING FORCE ON PISTON AND WALLS. THE PRESSURE INCREASED AND VOLUME ALSO INCREASE AS GAS PARTICLES EXPAND> THE BOYLE'S IS NOT APPLICABLE HERE BECAUSE THE TEMPERATURE IS NOT CONSTANT> NOW WHAT DO U GUYS THINK ???

 

[UFO_far_planet]

exactly....becoz when one lamp has been broken resistance has reduced. allowing more current to flow..the current passes through the voltmeter instead of going directly through the lamp(filament broken)..using V=IR, resitance has reduced...so voltmeter reading decreases

Dude, voltmeter has INFINITE resistance!