physics paper 1,2 ........can we discuus da papper nw?

[Fallen316]

And how much did we have to write in description of alpha and gamma particle?

alpha - helium nucleus, positive charge , any other characteristic
beta - electron , negative charge, any other '''
gamma - transverse electromagnetic wave , speed of light , any other '''

 

[bikermicefrmars]

great then .

Why was the distance only a few centimeters from the source? So that alpha can be detected right since its range is less?

 

[ashiqbal]

great then .

Why was the distance only a few centimeters from the source? So that alpha can be detected right since its range is less?

yes! and are you sure about the arrow pointing downwards at X?

 

[Fallen316]

great then .

Why was the distance only a few centimeters from the source? So that alpha can be detected right since its range is less?

that's one point.
other was beta could collide with air particles if source was away.

 

[bikermicefrmars]

I pointed it downwards...dont know if its correct but that seemed to be the only legit option !

 

[bikermicefrmars]

And u guys are sure that distance D was two wavelengths...i.e two crests away from X?

 

[ashiqbal]

And u guys are sure that distance D was two wavelengths...i.e two crests away from X?

yes! i checked in all ways possible. it was only option!

 

[Translucent231]

hahaha aray yaaar 2/3p => (2/3)p ab khush ek to fraction bhee nai likhna atay mujhe

 

[Fallen316]

And u guys are sure that distance D was two wavelengths...i.e two crests away from X?

yes, like 90% sure

 

[Fallen316]

hahaha aray yaaar 2/3p => (2/3)p ab khush ek to fraction bhee nai likhna atay mujhe

shukar karo paper me they didn't give an option of 2/3p , warna you would've done it wrong

 

[bikermicefrmars]

Thats great. Any other MCQ or question which most students got wrong?

 

[Doosh Bag]

Q9's last part was 3.2 !!!!!

The resistors were in parallel and 2.5

So, 1/2.5 + 1/2.5 = 4/5, which reversed makes total resistance 1.25.

The current was 1.6 and power loss is equal to current squared multiplied into resistance

1.6x1.6x1.25 : 3.2W

 

[Fallen316]

Q9's last part was 3.2 !!!!!

The resistors were in parallel and 2.5

So, 1/2.5 + 1/2.5 = 4/5, which reversed makes total resistance 1.25.

The current was 1.6 and power loss is equal to current squared multiplied into resistance

1.6x1.6x1.25 : 3.2W

resistors were in series , my dear friend

 

[Doosh Bag]

No. One on top and one exactly under it.

 

[Fallen316]

No. One on top and one exactly under it.

just seeing that one on top and one across it doesnt make them in parallel.
you had to see the whole circuit.
i did this mistake first too but then i figured it was wrong.

 

[Doosh Bag]

How was it in series then ??????

 

[Doosh Bag]

Ok, help me here :

Q1) Mass, extension one.
Q2) Car's acceleration and stuff
Q3) House heating
Q4) angle of incidence and 32. something as angle of refraction one
Q5) wave motion and stuff
.
.
Q8) Wire and stuff
Q9) transformer wala
Q10) Gamme rays and Beta rays and stuff

What were question 6 and 7 about ?!?!?

 

[Fallen316]

lets ask others about this. cuz im not quite sure myself
guys, are these 2 resistors connected in series or parallel ??

 

[bikermicefrmars]

Series, i guess!

 

[bikermicefrmars]

how was the scale used for the extension Q1(b)?