# Just finished Paper 1 of Edexcel IGCSE Physics 4PH0/1P

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Thread starter 1 year ago
#1
I found it quite well. I would say the hardest question was the last page There was nothing about moments and only one question about density. There probably will be a lot about moments and also the pressure density equation in paper 2.
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1 year ago
#2
What did you write in the resistance question
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1 year ago
#3
I messed up the radioactivity questions
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Thread starter 1 year ago
#4
(Original post by Nimzlol)
What did you write in the resistance question
It was the hardest one I think. I wrote that the gradient = 1/R. Resistance increases as voltage increases because as voltage increases current increases therefore temperature increases which means that the particles in the filament vibrate more which increases the resistance. I used data from the graph.
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Thread starter 1 year ago
#5
(Original post by Eden124)
I messed up the radioactivity questions
Sources: I wrote radon gas and cosmic radiation. The tube is the Geiger-Müller tube. The experiment: measure radiation without source. Repeat and take average. Measure with source. Repeat and take average. Subtract bg from answer. Final answer
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1 year ago
#6
What did you write for the question about what happens to the density of the material... ? I can’t remember exactly
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Thread starter 1 year ago
#7
(Original post by Nimzlol)
What did you write for the question about what happens to the density of the material... ? I can’t remember exactly
I wrote that the density of the material does not change because density is affected only by mass and volume. Then I quoted the density equation: d=m/V
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1 year ago
#8
(Original post by RayaanK)
I wrote that the density of the material does not change because density is affected only by mass and volume. Then I quoted the density equation: d=m/V
What are the grade boundaries ?
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Thread starter 1 year ago
#9
Just finished paper 2. It was very easy. The only hard question was the one about the transformer heating up.

They said that the transformer was 100% efficient.

Question:
The student notices that the transformer heats up a little. Explain what happens to the input voltage. Secondary current and voltage remain the same. (2)
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1 year ago
#10
(Original post by RayaanK)
Just finished paper 2. It was very easy. The only hard question was the one about the transformer heating up.

They said that the transformer was 100% efficient.

Question:
The student notices that the transformer heats up a little. Explain what happens to the input voltage. Secondary current and voltage remain the same. (2)
What did you write about the wavelength of sound waves?
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Thread starter 1 year ago
#11
(Original post by Jonathan Ares)
What did you write about the wavelength of sound waves?
I wrote since the speed decreases and frequency remains constant, wavelength decreases because speed=freq*wavelength
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Thread starter 1 year ago
#12
(Original post by Jonathan Ares)
What did you write about the wavelength of sound waves?
What did you write for the transformer thing
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1 year ago
#13
(Original post by RayaanK)
I wrote since the speed decreases and frequency remains constant, wavelength decreases because speed=freq*wavelength
I wrote the same thing. Just hopin it’s correct!
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1 year ago
#14
(Original post by RayaanK)
What did you write for the transformer thing
The transformer is not much efficient now. Input current increases as resistance increases but input voltage remains same. Not sure it’s right duh
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Thread starter 1 year ago
#15
(Original post by Jonathan Ares)
The transformer is not much efficient now. Input current increases as resistance increases but input voltage remains same. Not sure it’s right duh
I wrote that but then I crossed it out and wrote that it remains the same because they said that secondary current and voltage remain the same
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Thread starter 1 year ago
#16
(Original post by Jonathan Ares)
The transformer is not much efficient now. Input current increases as resistance increases but input voltage remains same. Not sure it’s right duh
You got it right! I got it wrong 😭. I wrote that but then crossed it out
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1 month ago
#17
Yo who does this now 😂😂😂 it’s 4PH1. A new crappy syllabus
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Thread starter 1 month ago
#18
(Original post by NebularCortex2)
Yo who does this now 😂😂😂 it’s 4PH1. A new crappy syllabus
Bruh look at the date lol. You're like a year late.
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