Edexcel Unit 4: Physics on the Move 6PH04 (11th June 2015)

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Can anyone explain these 2 questions to me?

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I have not done the first one yet but the second one is F=ma=mdv/dt= d(mv)/dt
So the gradient of the line!

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Reply 141

username1162972

Original post by BP_Tranquility

Does anyone know of any places to get a load of difficult unit 4 questions?

I found this custom made unit 4 paper on TSR but it doesn't have a mark scheme- would greatly appreciate it if someone made one though!!
http://www.thestudentroom.co.uk/showthread.php?t=1160855

Scribd 300 pages of old questions mate!

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Reply 142

username1162972

Okay so ive done 2 Unit 4 papers
Jan 2010 72/80
June 2010 63/80
Basically I get the capacitor questions mostly wrong when I do them, any advice or resources to get better at them?

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Reply 143

haappy17

The magnetic field is into the page. Using the left hand rule, I figured that D was negatively charged.

BUT the book says that C is negative, meaning D is positive. I dont understand..

Bubble chamber.png209.8KB

Reply 144

J_T_

I don't understand why this question is A. I got 1.2 Wb when doing the question.

Reply 145

iceangel8

Original post by J_T_

I don't understand why this question is A. I got 1.2 Wb when doing the question.

Flux linkage is NBA so 50x0.06x0.06x0.4= 0.072

Reply 146

kor97

Original post by haappy17

The magnetic field is into the page. Using the left hand rule, I figured that D was negatively charged.

BUT the book says that C is negative, meaning D is positive. I dont understand..

I have the same revision guide and I got D is negative as well so you're not going mad. Must be an error in the book.. Noticed a couple of small errors in it actually, which really isn't helpful.

Reply 147

J_T_

Original post by iceangel8

Flux linkage is NBA so 50x0.06x0.06x0.4= 0.072

Thanks. It's a bit annoying that they were really vague with the dimensions of the square because all they said was "the sides".

Reply 148

username1162972

Original post by kor97

I have the same revision guide and I got D is negative as well so you're not going mad. Must be an error in the book.. Noticed a couple of small errors in it actually, which really isn't helpful.

Looking at the question I agree with you two.

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Reply 149

cerlohee

For anyone who's done the v difficult Jan 2012 paper and was confused about the Ampere's law question, this vid explains it q well :smile:

https://youtu.be/BXKihkHjYes?t=3m40s

Reply 150

username1162972

Original post by cerlohee

For anyone who's done the v difficult Jan 2012 paper and was confused about the Ampere's law question, this vid explains it q well :smile:

https://youtu.be/BXKihkHjYes?t=3m40s

Do you know the right hand grip rule?

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Reply 151

cerlohee

Original post by physicsmaths

Do you know the right hand grip rule?

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Yea

right thumb is the current, right fingers are the magnetic field

Reply 152

username1162972

Original post by cerlohee

Yea

right thumb is the current, right fingers are the magnetic field

Good just checking 👀 lol.

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Reply 153

cerlohee

Original post by physicsmaths

Good just checking 👀 lol.

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hahaha
did you think it was an easy q? :smile:

Reply 154

username1162972

Original post by cerlohee

hahaha
did you think it was an easy q? :smile:

Havent done it yet ony done jan jun 2010. Im pretty good at fields though. Capacitors are mindblowing.

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Reply 155

cerlohee

Original post by physicsmaths

Havent done it yet ony done jan jun 2010. Im pretty good at fields though. Capacitors are mindblowing.

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Oh okay. Yeah I'm still not that good haha, but getting better (y)
What do you get wrong with the capacitors questions? It's always saying what happens when charging, or what happens when discharging and then doing a RC calculation to work out if the capacitor will be sufficient (which it always is) haha

Reply 156

username1162972

Original post by cerlohee

I am just so off with some the questions. I get charging and discharging but dont understand some of the longer written questions. The calculations are easy though.

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