Author Topic: ALL PHYSICS DOUBTS - POST HERE !!  (Read 225275 times)

holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #75 on: April 29, 2010, 04:19:39 pm »
2002 Nov Paper 3 Question 8:

Fig. 8.1 shows a long straight wire between the poles of a permanent magnet.
It is connected through a switch to a battery so that, when the switch is closed, there is a
steady current in the wire.

(wire in a direction at right angles to the page)

How can we find the direction of the movement of wire..I know by using fleming's L.H.R but there is no direction for current given?Or maybe i didnt understood the question :S

Read the question it says that the current flows into the page. Use Fleming Left hand rulle and it should be easy now.

Offline Malak

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #76 on: April 30, 2010, 12:54:19 pm »
Ohkay....Thx :)
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Offline omair

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #77 on: April 30, 2010, 01:23:57 pm »
how can we use the screw guage if there are many sheets of paper and  can you explain the specific latent and  specific heat capacity also how can we know which of the given objects have high heat capacity
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Offline astarmathsandphysics

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #78 on: April 30, 2010, 01:36:01 pm »
measure the thickness of 20 sheets of paper and divide by 20

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #79 on: May 01, 2010, 07:05:10 am »
how can we use the screw guage if there are many sheets of paper and  can you explain the specific latent and  specific heat capacity also how can we know which of the given objects have high heat capacity

 the equation for heat capacity ...... Energy = mass * heat capacity* (temp 2 - temp1)

to find whether this material has more or less heat capacity is by using the formula as follows:

heat capacity = Energy / mass *(temp 1 - temp 2 ) ......

if it has more difference  in the temperature it has low heat capacity , and vice versa.
..................................

as for the screw gauage , i never heard of it ?! so u'll have to tell me the paper that has this question so thati can help u .
...........................
specific latent heat of fusion = is the amount of heat energy given to a unit mass of a solid to change it to a liquid at a fixed temperature

specific latent heat of vaporization = is the amount of heat energy given to a unit mass of a liquid into vapor /gas at a fixed temperature

specific heat capacity = is the amount of heat energy given to a unit mass of a substance to  increase temperature by 1 degree Celsius

hope i  helped
« Last Edit: May 01, 2010, 12:16:32 pm by the golden girl »
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Offline sweetgirl

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #80 on: May 01, 2010, 08:07:47 am »
hey any one know what are the important topics for june unit 1 and 2 :)

holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #81 on: May 01, 2010, 08:14:23 am »
hey any one know what are the important topics for june unit 1 and 2 :)

I dont understand. Are you talking about IGCSEs ?

Offline Snake

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #82 on: May 02, 2010, 11:27:50 am »
Can some one please explain to me how to use F.L.H.R and F.R.H.R?
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holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #83 on: May 02, 2010, 11:47:07 am »
Can some one please explain to me how to use F.L.H.R and F.R.H.R?



FLHR

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #84 on: May 02, 2010, 03:55:29 pm »
i got a question for everyone but i'd also like astarmaths and physics to answer me if he wishes to .

um how do i revise for paper 6 and 1 phy IGCSE  on the night/day  before the Eaxm itself?

thx in advance
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Offline Snake

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #85 on: May 02, 2010, 04:00:47 pm »
i got a question for everyone but i'd also like astarmaths and physics to answer me if he wishes to .

um how do i revise for paper 6 and 1 phy IGCSE  on the night/day  before the Eaxm itself?

thx in advance

Well my friends who have done the IGCSE told me to just do past papers for 6 and 1 with revision, however I think I'm going to just study and do a couple of pastpapers before the test and go to bed early. Hope I helped  :)
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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #86 on: May 02, 2010, 04:04:06 pm »
Well my friends who have done the IGCSE told me to just do past papers for 6 and 1 with revision, however I think I'm going to just study and do a couple of pastpapers before the test and go to bed early. Hope I helped  :)

ya i was thinkin the same thing but i still wanna get diff opinions and take the average :P ......ur the first opinion so thx  :)
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Offline Cool guy

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #87 on: May 02, 2010, 11:30:43 pm »
i think that u should revise the notes..... By the way past papers r not going to help in exams so instead of wasting ur time on past papers do book or go through ur notes...... :P :)

holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #88 on: May 03, 2010, 05:26:04 am »
Are the connections correct for measuring the PD across the lamp ?
Or is it the second one ?

nid404

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #89 on: May 03, 2010, 05:33:34 am »
2nd one