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Author Topic: PHYSIC!!!!!!  (Read 3030 times)

Offline jmarc

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PHYSIC!!!!!!
« on: October 28, 2009, 03:03:27 am »
 :-X I DNT HOW THE CATHODE RAY OSCILLISCOP WORKS AT ALL .......................CAN U HELP IN JUN 09 / O LEVEL /PHYSICS / PAPER2 THE QUES ON THE CATHODE RAY
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Offline astarmathsandphysics

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Re: PHYSIC!!!!!!
« Reply #1 on: October 28, 2009, 08:00:28 am »
Think x axis time
y axis volts
in i) they start of ith 1 square on the y axis =2V but then they change it so 2.5 squares on the y-axis =2V
iii)The beam moves from left to right across the screnn at a constant speed and up and down to show the voltage. The net effect is that the voltage at particular times is shown
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Offline jmarc

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Re: PHYSIC!!!!!!
« Reply #2 on: October 28, 2009, 02:45:05 pm »
Thanks........but what about part ii and to chec that 1 verical position represents 2V
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Offline astarmathsandphysics

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Re: PHYSIC!!!!!!
« Reply #3 on: October 28, 2009, 03:26:46 pm »
Apply a battery voltage of 2volts and see if it goes up one square
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Offline astarmathsandphysics

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Re: PHYSIC!!!!!!
« Reply #4 on: October 28, 2009, 03:28:33 pm »
Or 10v and 5 squares
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zara

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Re: PHYSIC!!!!!!
« Reply #5 on: October 28, 2009, 05:43:30 pm »
have a look at the attached file.
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Offline jmarc

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Re: PHYSIC!!!!!!
« Reply #6 on: October 28, 2009, 08:24:44 pm »
Yeh Thanks alot!!!!!!
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Offline astarmathsandphysics

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Re: PHYSIC!!!!!!
« Reply #7 on: October 28, 2009, 08:53:03 pm »
I have written a page of cro notes which will go up tonight.
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Offline toobeerajpanchoo

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Re: PHYSIC!!!!!!
« Reply #8 on: November 04, 2009, 02:43:27 pm »
hey astar wanna know how you do calculate the time base and peak voltage
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Offline astarmathsandphysics

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Re: PHYSIC!!!!!!
« Reply #9 on: November 04, 2009, 02:59:19 pm »
Reading times no units per division
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Offline nits94

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Re: PHYSIC!!!!!!
« Reply #10 on: November 04, 2009, 04:27:26 pm »
hey i hv my physics prac paper 2mrw.. n just want to know..what topics r realyl imp??? I guess making circuits, refraction, nd any more??? cuz there r 4 pracs...
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Offline Ghost Of Highbury

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Re: PHYSIC!!!!!!
« Reply #11 on: November 04, 2009, 04:31:14 pm »
Physics :
1) measurement and errors
2) Circuits and symbols
3) Constand variable ( like if there is an experiment some variables are supposed to be constant wat are they and etc.)
4) Temperature
5) Mirrors and lens
6) Proportional
7) Latent and heat loss
8 ) Time - pendulum always asked
9) Variable resistor
10) Rate of cooling

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Offline Ghost Of Highbury

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Re: PHYSIC!!!!!!
« Reply #12 on: November 04, 2009, 04:37:56 pm »
record readings from diagrams of apparatus e.g. current readings
• answer questions on the arrangement of apparatus
• complete tables of data
• draw conclusions from information
• answer questions about experimental data
• plot a graph from a table of readings
• interpret information from graphs
• draw ray diagrams
• identify sources of error and suggest improvements in the experiment
• suggest suitable apparatus for investigations
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Offline toobeerajpanchoo

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Re: PHYSIC!!!!!!
« Reply #13 on: November 04, 2009, 07:11:35 pm »
hey astar could u give me formula to calculate time period, time for one cycle in cro can't still how to do it its nov 2006 p4 and i am certain sure that tomorrow cro would definitely come out please help me astar
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Offline nits94

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Re: PHYSIC!!!!!!
« Reply #14 on: November 05, 2009, 04:09:52 am »
Thanks A@di.. :) :)
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