Physics: Post your doubts here!

[Dream.Eater]

Why and how is it A?
Why not C ??

An electron is negatively charged so since the direction of the field goes from positive to negative, the electron is slowed down.

Since it began motion in a direction parallel to the field, it moves linearly.
It will only take a parabolic path once its out of the field, not while travelling in it

 

[Dream.Eater]

How on earth is the answer C?!

Btw this is from May 2003

 

[princess Anu]

use average currect which'll be 100+20/2 , multiply it by 8

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How on earth is the answer C?!

Btw this is from May 2003

 

[princess Anu]

are numbr of protons conserved in a nuclear reaction?

 

[THARINDU AWESOME]

I thought X and Y is actually the plastic region??
as shown here:

But then the answer is D :/ ???[/QUOTE

 

[Awesome12]

Can somebody please explain this?

 

[THARINDU AWESOME]

a is the answer.cos ( (1/2k+1/3k)^-1 )is the total spring constant.use f=kx then find the x value

 

[Dream.Eater]

use average currect which'll be 100+20/2 , multiply it by 8

Oh......so that's how its done...
But dont you usually find the diffrence in current and multiply that by time???

 

[Dream.Eater]

are numbr of protons conserved in a nuclear reaction?

Yep, proton no on LHS must be equal to the proton no on the RHS

 

[THARINDU AWESOME]

Yep, proton no on LHS must be equal to the proton no on the RHS[/QUOTE
lol

 

[muhammadali233]

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[THARINDU AWESOME]

▬▬▬▬▬▬▬▬▬▬ஜ۩۞۩ஜ▬▬▬▬▬▬▬▬▬▬ ＤＡＭＮ ＴＨＩＳ ＣＯＭＭＥＮＴ ＩＳ ＦＡＮＣY ▬▬▬▬▬▬▬▬▬▬ஜ۩۞۩ஜ▬▬▬▬▬▬▬▬▬▬

what?????

 

[muhammadali233]

what?????

isn't it?

 

[THARINDU AWESOME]

use average currect which'll be 100+20/2 , multiply it by 8

2003 can be wrong

 

[THARINDU AWESOME]

can some one check 2008 mayjune paper1 physics alevel question34

 

[princess Anu]

but then why is D not the ans here.. :/ :s both number of nucleon & neutrons are not conserved naa so how do we decide between C & D here?
the ans is C.

Yep, proton no on LHS must be equal to the proton no on the RHS

 

[princess Anu]

no.. whenever current is changing at a constant rate we always use the average current to find charge etc

Oh......so that's how its done...
But dont you usually find the diffrence in current and multiply that by time???

 

[THARINDU AWESOME]

anwser is C

 

[princess Anu]

Physicist

 

[nehaoscar]

How to do this?? it's A