# Edexcel IAL Physics Unit 03 WPH03 - 10th of May, 2017Watch

1 year ago
#81
(Original post by examhater44)
I kept my percentage uncertainty as 1.67% i didnt round it off to 1.7% i would still get the mark right?
Yeh that's rounded to 3sf so you'd be fine
0
quote
1 year ago
#82
I doubt it, sorry!

Posted from TSR Mobile
0
quote
1 year ago
#83
i think they allow 2.s.f. / 3.s.f .... if they see your previous working out and the method you have done.. i think they can award marks!!
0
quote
1 year ago
#84
Percentage uncertainty was 1.7%
I got same
0
quote
1 year ago
#85
(Original post by inshaa)
i lost my 2 marks there... i talked about the wave being hit on a barrier so it traveled a distance L a the reflected wave travels back giving a total distance of 2L
wait I wrote the same , is it wrong ??
0
quote
1 year ago
#86
What did the diagram look like for the circuit to find the resistance of a filament lamp?
0
quote
1 year ago
#87
(Original post by Droneon)
The burns occurred at the antinodes so distance between adjacent antinodes is half lamda. Therefore twice d is lamda.

Posted from TSR Mobile
wait how did u know that burns occur at anti node? didnt they say that the wavelength of the microwave is equal to twice the distance between the burn marks so isnt it suppose to be like lambda= 2 x length ?
0
quote
1 year ago
#88
(Original post by christos123456)
What did the diagram look like for the circuit to find the resistance of a filament lamp?
Idk if correct but I included a bulb , an ammeter, a voltmeter a battery and a variable resistor
what did u put ?
0
quote
1 year ago
#89
Because at anti nodes constructive interference occurs, causing the burn marks. Nodes have no energy
0
quote
1 year ago
#90
hey could we use vernier callipers for finding the distance between burn marks?
0
quote
1 year ago
#91
(Original post by ashmjj)
hey could we use vernier callipers for finding the distance between burn marks?
can we say like a normal ruler with a precision of 0.1 cm ??
0
quote
1 year ago
#92
(Original post by shahida sulaiman)
can we say like a normal ruler with a precision of 0.1 cm ??
i think u can i mean why not meter rule can be used to find that distance just that it's not that precise as vernier!
0
quote
1 year ago
#93
(Original post by ashmjj)
i think u can i mean why not meter rule can be used to find that distance just that it's not that precise as vernier!
but they didnt say anything about the instrument ,they say like the instrument u would use and the choice of instrument , they didnt say anything about it being precise right ?
0
quote
1 year ago
#94
I got the same!

(Original post by shahida sulaiman)
Idk if correct but I included a bulb , an ammeter, a voltmeter a battery and a variable resistor
what did u put ?
0
quote
1 year ago
#95
(Original post by shahida sulaiman)
but they didnt say anything about the instrument ,they say like the instrument u would use and the choice of instrument , they didnt say anything about it being precise right ?
yep they dint! DW meter rule scores the marks
0
quote
1 year ago
#96
(Original post by ashmjj)
yep they dint! DW meter rule scores the marks
yeah thats the problem I just wrote a ruler with 0.1 cm precision , I think thats wrong
0
quote
1 year ago
#97
(Original post by christos123456)
I got the same!
do they like give zero if we convert like mm to m or MHz to Hz wrong ?

(Original post by ashmjj)
yep they dint! DW meter rule scores the marks
0
quote
1 year ago
#98
I don't think so, I put ruler to be safe
0
quote
1 year ago
#99
(Original post by shahida sulaiman)
yeah thats the problem I just wrote a ruler with 0.1 cm precision , I think thats wrong
Why do you think it's wrong?
0
quote
1 year ago
#100
(Original post by FutureStripper)
Why do you think it's wrong?
because of the precision and mostly people wrote meter rule not ruler
0
quote
X

new posts
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### University open days

• University of Lincoln
Mini Open Day at the Brayford Campus Undergraduate
Wed, 19 Dec '18
• University of East Anglia
Fri, 4 Jan '19
• Bournemouth University
Wed, 9 Jan '19

### Poll

Join the discussion

Yes (173)
67.58%
No (83)
32.42%