Physics Paper 12 How was it

[good man12]

gas pressure

sorry, then in that case it may be wrong........but im still not remembering what they asked for

 

[Iadmireblue]

what did you all get for the power question? i got D,i think it was 47%

 

[nicoles]

what did you all get for the power question? i got D,i think it was 47%

people said it was D also..but idk..hehe

 

[leosco1995]

what did you all get for the power question? i got D,i think it was 47%

Yeah, it was D. You had to find mgh, which was something like 15k. And the power was IV which was 7360 I think. Power/mgh gave the efficiency.

 

[Anonymous']

Hmm.. What was the answer for the frequency of a wave when passing through a gap?

 

[nicoles]

Hmm.. What was the answer for the frequency of a wave when passing through a gap?

i answer 3lambda but i dont know..how bout u?

 

[Anonymous']

i answer 3lambda but i dont know..how bout u?

I also answered 3lambda.. but im not sure whether that's correct or not..

 

[good man12]

i answer 3lambda but i dont know..how bout u?

it was the time taken for the wave front to reach point p which was : 3lamba/c

 

[good man12]

u did have to add the atmospheric pressure im sure about that

sorry for that minor argument, i totally forgot to add atmospheric pressure, you were right, and what was ur answer for the stationery wave one and what was for the one about two copper wires with variable diameters and the electron speed in them, i used I=navq to solve it qualitatively

 

[aom]

i suppose 24 hours are gone and so here is the list i made.........

not all correct... but good effort ... Thank you..

 

[good man12]

not all correct... but good effort ... Thank you..

kindly tell me which are wrong so i can get an accurate estimate of my marks.....i think at most only 4 max can be wrong.........

 

[WhereAmazingHappens]

wL/4 clockwise

r u sure? even i put WL/4 clockwise but my frnds told me it is WL/2 clockwise

 

[good man12]

r u sure? even i put WL/4 clockwise but my frnds told me it is WL/2 clockwise

the block was going to move in the anti clock wise direction, so the torque had to be applied in the clock wise direction to keep it at equilibrium

WL/2 was the force........the torque how ever was WL/4

 

[Silent Hunter]

What about the very first one? Watt one i suppose?

 

[Beaconite007]

What about the very first one? Watt one i suppose?

its answer was C

 

[Beaconite007]

wat was the answer to that momentum Q in which the two balls collided. was it D??.

 

[Beaconite007]

the red nd green light dimly( option D). m i correct?

 

[umarashraf]

the strain energy question, just calculate the area undr the graph rite..but i din really get B..n when i calculated using the smaller boxes, i got A
n question num 16, if u heat the gas, i thought the kinetic energy increases n so the collision increases right?? i answered the statement with the mean separation

yeah.. every single person who calculated small boxes opted A as the answer.. my answer was also B... there is a definite confusion in it..

 

[umarashraf]

in B the reaction force from ice was vertically up wards which means that ladder was at rest and in the question they said it was sliding

no D is correct i think, i cant rmember the options

well ice was frictionless, so R was always vertical in direction... nut the wall was rough... when the ___ was sliding down, the frictional force would be in upward direction while the reaction force was in horizontal plane... so their resultant was in direction at an angle 45 to the horizontal.. which was B.. cut my head if gets wrong

 

[aom]

kindly tell me which are wrong so i can get an accurate estimate of my marks.....i think at most only 4 max can be wrong.........

your answers are correct .... i think except for the pressure and the slidiing ice and some other confusion question.... but for sure u will get above 35.... wish u all the best.... i might be wrong though