Where an electric field affects charges, a magnetic field affects magnetic poles, A region of space which will cause a magnetic pole to feel a force is called a magnetic field.
(reliable because it's from the Edexcel textbook word for word)

Reply 350

Ambrina

2

A few people were discussing why the momentum was zero in the collisions question in Jan 2014 IAL. It's because they were asking if the proton is stationary. If a stationary object explodes, then the total momentum of all the shrapnel parts added up (taking account of the direction of their movements) must be zero. In physics terms, any such event with the initial momentum as zero is termed an explosion, although it may not be very dramatic.
Hope this helps. It's in the text book too, in the very first chapter

Reply 351

kor97

1

Original post by Amir52

Anyone can explain the physics behind question 8?
https://ad57adc4f6eb5ea42b541057f16290e611d4e42b.googledrive.com/host/0B1ZiqBksUHNYcHRSNUJpeFpqNXM/June%202014%20QP%20-%20Unit%204%20Edexcel%20Physics.pdf

force for alpha = B*q*v
the charge for alpha is +2e and the charge for beta is -e
so force for beta = (0.5B)*(0.5q)*(10v)
0.5*0.5*10 = 2.5 so answer is C

Reply 352

Freddy-Francis

9

This dude has a jackpot of the latest papers, found his blog randomly while searching for Jan'15 papers.
http://56leomessiphotoshop.blogspot.ae/p/edexcel-ial-exam-materials.html

(edited 8 years ago)

Reply 353

bobo19966

2

Original post by Hectors

In the june 2014 IAL paper a mark is given for saying this.

Really? Maybe about the wording of the question look at June 13 R paper and jan 13

Reply 354

BP_Tranquility

5

Original post by bobo19966

Quick question: Why is this not a valid conclusion on the Rutherford scattering experiment?

The nucleus is positively charged

In every single mark scheme this conclusion didn't credit marks :angry:

Original post by Runner104

yeah I noticed that too :/ maybe because they didn't know the charge of an alpha particle I'm guessing?

It's because the nucleus could be negative since the alpha particle might be deflected by more than 90 degrees if it is whirled around the nucleus (like a comet attracted to the sun and being pulled around due to gravity)

Posted from TSR Mobile

Reply 355

BP_Tranquility

5

Is N in flux linkage the number of coils or turns in a coil of wire (or is that the same thing)?

Posted from TSR Mobile

Reply 356

Hash1mate

1

Original post by BP_Tranquility

Is N in flux linkage the number of coils or turns in a coil of wire (or is that the same thing)?

Posted from TSR Mobile

Turns in a coil, completely different.

Reply 357

username1162972

18

Original post by Ambrina

Where an electric field affects charges, a magnetic field affects magnetic poles, A region of space which will cause a magnetic pole to feel a force is called a magnetic field.
(reliable because it's from the Edexcel textbook word for word)

Not saying your wrong but in the edexcel MS they just a region of space where a force is exerted on a moving charg or current carrying conductor (2 marks)

Posted from TSR Mobile