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Plz help with this..
May,june 11 paper 23 qno 3 d i and ii
Qno 4c ii and iii and 5 i
May,june 11 paper 23 qno 3 d i and ii
Qno 4c ii and iii and 5 i
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Plz help with this..
May,june 11 paper 23 qno 3 d i and ii
Qno 4c ii and iii and 5 i
in the first part let us consider b as a junction so current entering B are ( I1 and I3) = current leaving junction B = I2My doubt is related to the question I attached.
How currents are related in this question. The answer is "I1 + I3 = I2", but can someone please explain according to the law "sum of currents in to the junction equal to out of the junction." How signs are put over here.
Next part: Why e.m.f's are subtracted in this question.. Aren't they to be added?
I am pretty much disappointed from my concepts of Kirchoff's law. Please help me to do this Question (taken from OCT/NOV 2011 - p22).
I'll be your grateful.
if the ball is traveling against the gravitational pull then its acceleration will be negative that is obvious!In the projectile motion?
when the ball is thrown upwards and it just touches the height of the wall.... will we take acceleration as -9.81 ? or +9.81 ?
like in this paper: http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w10_qp_22.pdf question 2 (a)(ii) they have taken s = ut - 0.5at^2 why "-" ? why not plus?
you did not specify the question !
you did not specify the question !
is it about principle of superposition ??
if so :
principle of superposition of waves states that when two waves superimpose or overlap then the resultant displacement is sum of individual displacements.
For Question#5(a)(i)please explain : question 5 ( 22/2010)
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_23.pdf
Q2 whole question plzzz sraw the vector diagram plllllllllzzzzzz help
the speed 5.0*10^8 is the horizontal speed of the electron and in (d) we calculated from the vertical displacement after the acceleration of 2.4*10^15, the initial velocity used here is vertical which is zero.http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s07_qp_2.pdf
in question 1 (d) ... why have they put u = 0 ? cuz its says the electron travels initially at the given speed in part (c) .... so doesnt it mean that the u = 5.0 x 10^7 ? why 0 ?
thank you
Which factors affect the brightess and darkness of fringes except amplitude and distance(D) of the slits from the screen,,
ThanX alot manQuestion#2
(a)
1. Sum of all the force's acting on the body must be zero.
2. Sum of moment of torque must be zero i.e sum of clockwise moment = sum of anti-clockwise moment.
(b)
(i) Force's with equal magnitude represented by the side of the triangle and the arrow used is for the direction, head to tail rule is applied here.
(ii) it show's cyclic vector's.
For further assistance, i have attached a picture.
(c)
In this part, take the readings from the scale i.e 1cm=1N so T1= 6.5N, T2= 4.7N.
(ps. the readings won't match ms, due to the size of paper used in past papers)
I have attached a picture for this as well.
(d)
Since the force's in string's are horizontal, there is no vertical force's to support the weight and hence, it is not possible to create tension in 7.0N of weight.
(Ps. my drawings are really bad, but i tried making it clear for you by editing a bit.
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