Physics MCQs thread.

[shyqueen]

can sumone plzzzz explain da answer to question.no 13 and 33 m/j2010 variant 1...!!!

 

[unique840]

can sumone plzzzz explain da answer to question.no 13 and 33 m/j2010 variant 1...!!!

current in P is I
current in Q and R is (I/2)
power = I^2*R
for P, power= I^2*R
for Q, power= (I/2)^2*R
for R, power= (I/2)^2*R
12= (I/2)^2*R + (I/2)^2*R + I^2*R
12= I^2*R (0.25 + 0.25 +1)
12/1.5 = 8
I^2*R = 8
for R, power is 0.25 I^2*R
that is 2W

 

[abrraza]

well here as half the water will travel to the othr container the hieght will drop to half, and also the mass, as there will only be half as much water in that side
so it will be B

thats ok .. hieght is half.. but how come mass can be half?

 

[unique840]

well here as half the water will travel to the othr container the hieght will drop to half, and also the mass, as there will only be half as much water in that side
so it will be B

thats ok .. hieght is half.. but how come mass can be half?

cox half of mass is transferred to Y

 

[arlery]

well here as half the water will travel to the othr container the hieght will drop to half, and also the mass, as there will only be half as much water in that side
so it will be B

thats ok .. hieght is half.. but how come mass can be half?

Since half of the water level is reduced, so half of the mass shifted to the right side, hence mass is halfed.

 

[abrraza]

???????? :%) :%) :%) :%) :%)

 

[ShootingStar]

Answer is B..explain pls..

 

[unique840]

???????? :%) :%) :%) :%) :%)

it shud be B :%)

 

[arlery]

^ for which question?

 

[abrraza]

well here as half the water will travel to the othr container the hieght will drop to half, and also the mass, as there will only be half as much water in that side
so it will be B

thats ok .. hieght is half.. but how come mass can be half?

Since half of the water level is reduced, so half of the mass shifted to the right side, hence mass is halfed.

but they asked overall effect not at oneside of it.. :%) :%)

 

[abrraza]

???????? :%) :%) :%) :%) :%)

it shud be B :%)

i also did B but dats not correct

 

[arlery]

Yeah but we are telling the overall effect. Firstly that water level on right side is increased, then water level on one side is reduced.

 

[shyqueen]

thnks fo explainin!
can u plz also explain Q.no 13 of da same paper...

 

[abrraza]

Yeah but we are telling the overall effect. Firstly that water level on right side is increased, then water level on one side is reduced.

mass is constant .. as not loss in water has occured.. only 'h' has been reduced to half value still confused!! :%)

 

[unique840]

thnks fo explainin!
can u plz also explain Q.no 13 of da same paper...

i even dun knw that answer. sorry

 

[shyqueen]

ohh okiee npp!!!

 

[arlery]

Yeah but we are telling the overall effect. Firstly that water level on right side is increased, then water level on one side is reduced.

mass is constant .. as not loss in water has occured.. only 'h' has been reduced to half value still confused!! :%)

Yeah you're right. My bad on the previous part. It is only height that will be gained on side and reduced on one side.

 

[abrraza]

maslaa...

 

[arlery]

^ is ka answer ms main kya hai?

 

[unique840]

maslaa...

9.9 m deep