1)t root2, 2)460 and current its greater that 0.26, 3)path of electron was A the arrow pointing upwards, 4)potential was at mars, not the moon (but whatever) or something was -13, 5)maximum value of tension was 24 6) kinetic energy of p was greater than q but potential energy was less that q 7) capacitance graph question was D, 8) fe>fm>fs(i think that is Fe>Fs>Fm) 9) ratio of y/d=1/3
10) R earth/Rmoon=14
11)which one is incorrect: when spring is compressed &suspended,it has minimum PE 12) which one is incorrect: change of momentum=zero 13)moving horizontally,Blv …
13) Capacitance value of 0.02F for one question forgot which was, answer choice was B IIRC
1a)define shm:
acceleration is proportinal to displacement, and acceleration acts toward equilibrium (2)
acceleration was rounded to -0.43
frequency of pendulum = 0.503 3s.f (3)
time for oscilations to be in phase again = 38 (3)
2) voltage = 30,000 (1)
b) (3) i think this was the capacity was increase from X to Y. find the energy stored? wasnt this the time taken for the spark to be produced?
yes, i think it was similar:
b) i think this was the capacity was increase from X to Y.time taken for the spark to be produced after the last discharge?
then Q=CV, then Q/Current = time was ~ 3.46s????(3.46 days……rate is ?A a day)
you had to work out the charge stored and then use the current they gave you to find the time??
c) time taken for discharge will increase because time constant increases (2)
d) flash is brighter because more energy stored (2)
3) 2 conditions when no force is exerted on the partcle (2)
field is parallel to velocity
particle is stationary
b) prove momentum is proportional to radius= mv^2/r = BQv , mv = BQr --> mv = kr
b ii) speed of particle was definitely around 8.7 X 10 ^ 7
c)time taken for partile to go through 1 dee = ~6.8x10^-8
d)show the time taken is independent of radius = 2pim/bq (3)
kinetic energy im MEV = 2.44 (3)
The six marker was Question 4
1. gravity always attractive
2. electric attractive/repulsive
3. both follow inverse square for Force
4. both follow inverse for potential
5. gravity uses mass
6. electric uses charge
7. only electric fields can be shielded
8. only electric fields depend on medium between charges
9. gradient of potential vs distance graph gives field strength
10. potential definition for both revolves around bringing a mass/charge from infinity to a certain point in a field and is zero at infinity
angle for max emf = 60 degrees -- this is at 90 degrees to the plane as emf = BANw sin(wt) therefore max emf is when sin(wt) =1, there for wt (which is the angle) = 90, 90-30 = 60 degreed
angle for max flux linkage = 5pi/6 = 2.62 radians -- this is at 0 degrees = 180 degrees, and N(PHI) = BAN cos(THETA), so max is when cos(THETA) = 1 so theta = 180, 180-39 = 150 degrees = 5pi/6
gradient of graph = emf (1)
drawing a graph (2) Positive Sine graph
peak voltage (3) I got 0.55 for peak to peak voltage then divided by 2 to get 27.5V but there is no set agreement on what the value is for this answer yet..
calculate flux density = 0.26 (2)( got 0.25 here) I got 0.25 as well
My adjustments made in bold, whoever remembers a section A question not listed, throw it in!