Physics: Post your doubts here!

[Muhammad TAimoor]

Can any one explain me this paper Q2 part c

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w11_qp_21.pdf

Make the point P, the pivot. That means, Rope A has zero force. Now apply sum of anti-moments = Sum of clock-moments. You'll get the Rope B force.
Use it further through the same formula to find Tension in Rope A.

 

[imack94]

There is a constant error present in all the readings (zero error, a systematic error). Now, when there is 0 voltage, the current should also be 0, right? But, the graph shows that when the voltage is 0, the current is 0.05 A which tells us that all reading are incorrect by +0.05 A. To account for this error, you'll subtract 0.05 from the reading across any voltage. This is the explanation for getting the correct answer. You need to describe/show this in your answer.

Here's the solution:
Resistance = V/I
when V = 2 V, I = 0.14 A,
correcting error, I = 0.14 - 0.05 = 0.09 A
Resistance = 2/0.09 = 22.2 ohms (correct to 3 s.f.)

Thanks man

 

[fjmskt]

Can anybody help with the question 16.7.?
It's a question from Robert Hutching's book.

 

[Muhammad TAimoor]

Can anybody help with the question 16.7.?View attachment 32673

Is that nC or mC? And what's equipotential lines? O______O

 

[fjmskt]

All 4 corner charges are of nC.

 

[Muhammad TAimoor]

Well i don't think these kinda questions come, so better leave stuff like this. It'll only make you, And Me Ofcourse, more tensed.

All 4 corner charges are of nC.

 

[fjmskt]

Well, we are never sure of what is going to come. -.-
So it's better to practice than..

 

[Muhammad TAimoor]

Well, we are never sure of what is going to come. -.-
So it's better to practice than..

As you wish

 

[Muhammad TAimoor]

Well, we are never sure of what is going to come. -.-
So it's better to practice than..

As you wish

 

[fjmskt]

Sure thing.

 

[Musab100]

Make the point P, the pivot. That means, Rope A has zero force. Now apply sum of anti-moments = Sum of clock-moments. You'll get the Rope B force.
Use it further through the same formula to find Tension in Rope A.

Thankxx man !!

 

[Hassan22]

wave straight kasy banti ha?

 

[Muhammad TAimoor]

wave straight kasy banti ha?

Straight wave is the property of Stationary Waves. At time= 0, the stationary seems like an ordinary transverse wave. At time= 1/4thT, it becomes straight. Then at 1/2T, its transverse in the reverse direction and then, at 3/2T, its straight again and so on.

 

[7865]

Does anyone have the May june 2013 mark scheme variant 21?

 

[NidaChaudhary]

Does anyone have the May june 2013 mark scheme variant 21?

http://olevel.sourceforge.net/papers/9702/9702_s13_ms_21.pdf

 

[student013]

Can someone who've gone through numerous Physics Paper 5, can post papers where he/she've encountered the most difficulty!! Waiting, this gonna help between>>

 

[salvatore]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s06_qp_4.pdf

Could someone please help me with the whole of qn 8 of this paper? I'll really appreciate it

Thanks

I'm re-posting this.. anyone??

 

[WYuMon]

Anyone help me withJune2012 paper 42 Question 5.C

 

[forever_chocoholic]

please someone help me with these 2 questions...... why is 6c?? in May/june 2008 Paper 1
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s08_qp_1.pdf
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s08_ms_1.pdf

and why is 8d and not c??? in May/June 2012 Paper 1
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_qp_12.pdf
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_ms_12.pdf
I hope we all do well in our exams this year ....InshAllah
Please reply asap!!!

 

[sasuke474]

Can someone help me learn the kinematics equations? They won't stay in my head no matter what