Physics: Post your doubts here!

[ZaqZainab]

midha.ch
ZaqZainab
Suchal Riaz
sagar65265
sitooon

i am an AS student too

 

[Thought blocker]

i am an AS student too

Woops! Okay...

 

[sitooon]

For a single discharge , whats the average potential difference ?
it should be 1.6 , but the answer is 3.2

 

[Suchal Riaz]

I am AS too

 

[Faizan Muhammmad]

View attachment 38632
For a single discharge , whats the average potential difference ?
it should be 1.6 , but the answer is 3.2

look at the scale again
its n0t 1,2..
but 2,4..

 

[Suchal Riaz]

Can anyone help me with question 2?

they would give you the apparatus so you will decide like that. if you send me the confidential instructions of that year i can tell you how it has to be done. ok?

 

[Thought blocker]

they would give you the apparatus so you will decide like that. if you send me the confidential instructions of that year i can tell you how it has to be done. ok?

HOW CAN YOU SOLVE A2 QUESTIONS ?

 

[Namehere]

look at the scale again
its n0t 1,2..
but 2,4..

I dont get it, each square is 0.4 and the discharge occurs over 4 squares so, 0.4*4 = 1.6V
Could you explain it please.

 

[Thought blocker]

I dont get it, each square is 0.4 and the discharge occurs over 4 squares so, 0.4*4 = 1.6V
Could you explain it please.

I posted same... but I deleted the post

 

[Suchal Riaz]

HOW CAN YOU SOLVE A2 QUESTIONS ?

was it practical paper or written paper? we did a practical paper (in AS) which was similar(involved strength of magnets) so i thought it would be similar. i thought it was practical paper and i didn't read it carefully. sorry.

 

[Thought blocker]

was it practical paper or written paper? we did a practical paper (in AS) which was similar(involved strength of magnets) so i thought it would be similar. i thought it was practical paper and i didn't read it carefully. sorry.

wow!!! sorry for ??

 

[Suchal Riaz]

wow!!! sorry for ??

bothering

 

[Thought blocker]

bothering

fast reply ?

 

[Faizan Muhammmad]

I dont get it, each square is 0.4 and the discharge occurs over 4 squares so, 0.4*4 = 1.6V
Could you explain it please.

Max=4
Min=2.4

average=(2.4+4)/2=3.2

 

[Thought blocker]

Max=4
Min=2.4

average=(2.4+4)/2=3.2

Itna easy tha

 

[ZaqZainab]

Anzuman turin
Question 36
sorry for the scribbling in the corner

 

[Namehere]

Max=4
Min=2.4

average=(2.4+4)/2=3.2

I feel stupid

 

[Suchal Riaz]

Q17 As the reading of gavanometer is zero so the pd across that part of wire = E2 as we know the length so we can find pd/length using E2/XT. we already know XT and only need E2. (there are many ways to calculate that but for other methods more than one readings are required)
Q19 percentage uncertainty = error/reading as the reading increase the %uncertainty decrease. so it least near 100 C

 

[Suchal Riaz]

Q 21
power = work done/sec = IV = 200*6000 = 1200000 W
change in Potential energy/sec = mgh/sec =(m/sec)*gh = 500KgS- * 9.81ms-2 * 300m = 1471500W
efficiency = 1200000/1471500 = 81.5%
D
Q23
extension = F/k =W/k

k of parallel springs add together: 2k
springs in series add like resistors in parallel: 1/2+1/3 = 1/k, k=6/5

e=f/(6/5k) = 5W/6k
Q25
length = 3λ
speed = c
time = length/speed = 3λ/c

 

[Suchal Riaz]

27- U of three blocks increase as their heights are increased by 1h, 2h and 3h.
so total change will be 6mgh