• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Physics: Post your doubts here!

Messages
1,394
Reaction score
12,123
Points
523
I know what a horizontal line is. :p I don't get why.
Lol. :p

upload_2016-1-24_8-14-24.png
consider the point X. the blue line + green line + orange line + purple line = one cycle.

0.25 = quarter cycle.

so quarter cycle = blue line only.

if you do the same for all the other points on the wave, you'll see that after quarter cycle all the points will lie on the red line.

I hope i'm successful this time :p
 
Messages
4,988
Reaction score
23,955
Points
523
Lol. :p

View attachment 58955
consider the point X. the blue line + green line + orange line + purple line = one cycle.

0.25 = quarter cycle.

so quarter cycle = blue line only.

if you do the same for all the other points on the wave, you'll see that after quarter cycle all the points will lie on the red line.

I hope i'm successful this time :p
Yes,thank you for taking the time!
 
Messages
140
Reaction score
414
Points
73
View attachment 58997

why will the change in potential energy and the change in kinetic energy be equal??

Conservation of energy. Total energy of an isolated system remains same (all forms in which energy is lost will be gained in other forms).
Here, there are only two energies that we need to consider, i.e, the kinetic energy and electric potential energy ... so loss in one equals the gain in other.
 
Messages
275
Reaction score
558
Points
103
Conservation of energy. Total energy of an isolated system remains same (all forms in which energy is lost will be gained in other forms).
Here, there are only two energies that we need to consider, i.e, the kinetic energy and electric potential energy ... so loss in one equals the gain in other.

thnx.. but can you pls help with the calculation part??
 
Messages
140
Reaction score
414
Points
73
b(1) and c

b)(i) is a direct question. The plates must be parallel so that the field is uniform; and horizontal so that the field is vertical. (Since the experiment involves finding the charge on the oil drop by balancing the electric force and gravitational force acting on it.)

c) All these values are small integer multiples of a certain base value, which is equal to 1.6*10^-19 and is the negative of the charge of an electron. (This was proposed by the Millikan oil drop experiment. I am not sure of the details to this.)
 
Top