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Physics: Post your doubts here!

nehaoscar

nehaoscar

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Konstantino Nikolas said:
View attachment 59394
View attachment 59395
So yes, electric field strength is a vector quantity ... But are the directions opposite coz the field lines will go INTO both the alpha particle and the proton?

And this ...
force per unit charge M1
on either a stationary charge
or a positive charge

Should we write either of the two .. or should we write 'either a stationary charge or a positive charge'?? :p
Click to expand...
Since it's a vector quantity and both charges are +ve the field at P due to the 2 particles are in opposite directions so the opp. signs
 
nehaoscar

nehaoscar

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The Sarcastic Retard said:
I am so dumb :/
can u please show the steps :(
Click to expand...
So if u take that red box ie 5*5 sqaure the wd for that one box is E*d which is approx 2.5x10^3*1x10^-2 (we'll call this answer as Z ... I'm too lazy to work out the ans :p )
Now count approximately how many of these 5*5 boxes will fit under the curve. This will be say n boxes
So then multiply Z*n to get the total wd
 
Catherine_1

Catherine_1

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photoelectric effect.png
Hey,
Could anyone please provide me with the reasoning for the following questions of the photoelectric effect:
a) In graph 2 why does increase in frequency cause current to increase at a decreasing rate?
b)In graph 3 and 4 , what does negative stopping potential imply?Like what exactly does it mean?

Please help.:)
 
The Sarcastic Retard

The Sarcastic Retard

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nehaoscar said:
ii
intially ke + gpe = epe
so ke = epe - gpe

iii
fusion may occur
Click to expand...

intially ke + gpe = epe
<------ how do u know this? :p

How do u know exact answers as ms?? :p
u use exact word.. How u know this all thingssssss??
I can never think this as u think :(
 
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nehaoscar

nehaoscar

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The Sarcastic Retard said:
intially ke + gpe = epe
<------ how do u know this? :p

How do u know exact answers as ms?? :p
u use exact word.. How u know this all thingssssss??
I can never think this as u think :(
Click to expand...
cause at the start they have ke and are far apart so have gpe
As they come closer gpe decreases and ke becomes zero so these 2 energies converted to epe
lol practice and you'll know how to do it :)
 
Catherine_1

Catherine_1

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Can anyone please suggest good resources/files for Eddy currents and Cathode ray Oscilloscope and photoelectric current?:p :)The mass-energy concept in nuclear physics too?:D
Also, can anyone explain the syllabus statement 25.2 d)?:)
The statement is-: Explain why maximum photoelectric energy is independent of intensity,whereas the photoelectric current is proportional to intensity?:)

Lastly,:p what is galvanometer in the null method?:p

:)
 
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The Sarcastic Retard

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nehaoscar said:
cause at the start they have ke and are far apart so have gpe
As they come closer gpe decreases and ke becomes zero so these 2 energies converted to epe
lol practice and you'll know how to do it :)
Click to expand...
Min Ke = Max Pe
Ke = EPE - GPE. (Always GPE < EPE) If I say this, is my way correct?
 
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