Author Topic: ALL PHYSICS DOUBTS - POST HERE !!  (Read 225502 times)

Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1770 on: May 26, 2010, 10:39:33 am »
a women tune her radio to a station broadcasting on 200m

what does 200m tell her about the radio wave?

freq

wave leng

sped

ampl

My guess is wavelength, but am not sure!
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holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1771 on: May 26, 2010, 10:39:57 am »
Silicon, or germanium.

What components are logic gates made from ?

Offline Vin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1772 on: May 26, 2010, 10:40:25 am »
What are logic gates made from ???

I think they are made from different combination of transistors- semiconductors and stuff .. it would be different for each gate.. :-\

Offline Vin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1773 on: May 26, 2010, 10:41:12 am »
My guess is wavelength, but am not sure!


yup it has to be right ??

Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1774 on: May 26, 2010, 10:41:16 am »
What components are logic gates made from ?

Transistors right?
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Offline the_grim_reaper

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1775 on: May 26, 2010, 10:43:03 am »
Transistors and semi-conductors no doubt. But since they are made from germanium or silicon, so logic gates can be made up of em'. Don't worry, they won't ask you to make one in paper 1 ;D ;D...

Offline 8T

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1776 on: May 26, 2010, 10:44:07 am »
yup it has to be right ??
I think its frequency
Know how to ask. There is nothing more difficult for some people, nor for others, easier.

Offline the_grim_reaper

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1777 on: May 26, 2010, 10:45:12 am »
My guess is wavelength, but am not sure!


Has to be wavelength. Frequency and speed aren't measured in metres and I've never heard radios brodcasting waves with an amplitude of 200 metres :D.

Offline Dana

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1778 on: May 26, 2010, 10:45:46 am »
P=E/T so E=PT=100*40=4,000

E=mCT so T=E/mc = 4000/(2*400) = 5

A?
Ohhh I totally ignored the 40s. Thanks so much :D

holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1779 on: May 26, 2010, 10:46:17 am »
Transistors and semi-conductors no doubt. But since they are made from germanium or silicon, so logic gates can be made up of em'. Don't worry, they won't ask you to make one in paper 1 ;D ;D...

I FINISHED PAPER 1


I am studying for PAPER 3

Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1780 on: May 26, 2010, 10:46:57 am »
What components are logic gates made from ?

http://www.play-hookey.com/digital/electronics/

dont worry, they wont ask wat is inside a logic gate..
divine intervention!

6394

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1781 on: May 26, 2010, 10:50:12 am »
http://www.play-hookey.com/digital/electronics/

dont worry, they wont ask wat is inside a logic gate..
no dey do i dnt rem i thnk in mocks or sumthin
ddey asked wat components are logic gates made from ?
one is transistor n othr i will chk my txt bk

Offline WARRIOR

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1782 on: May 26, 2010, 10:51:28 am »
http://www.play-hookey.com/digital/electronics/

dont worry, they wont ask wat is inside a logic gate..
aadi  for u

a women tune her radio to a station broadcasting on 200m

what does 200m tell her about the radio wave?

freq

wave leng

sped

ampl
NO secrets to SUCCESS , it is the result of 1.HARD WORK 2.GOOD PREPARATION 3.LEARNING FROM FAILURE
But it ain't how hard you hit; it's about how hard you can get hit, and keep moving forward-Balboa

Offline Dana

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1783 on: May 26, 2010, 10:51:37 am »
What abt this one ::) I really don't get it?   ???

Four metal rods are placed, in turn, inside a coil of copper wire.
Which rod would be the most suitable to use for the core of a coil in a circuit breaker?

number of paper clips picked up when there is a current in the coil:     number of paper clips still attracted when the current is switched off:
A                                 1                                                                                            0
B                                 20                                                                                           2
C                                 35                                                                                           0
D                                 35                                                                                           30




Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1784 on: May 26, 2010, 10:51:42 am »
Can anyone please clear doubt about magnetism.  So ferrous materials can be magnetised (e.g. iron and steel).  All ferrous materials can be magnetically induced (so both sides of a magnetic object attracts).  

However, a magent has poles.  To make magnet, you place in d.c. current.

I'm not sure, but am i right in saying that in magnetic induction, the thing being induced is not a magnet, because it does not have magnetic field lines?

By the way, iron is magnetically soft, so loses magnetism easily right?
Always willing to help!  8)
"In helping others, we shall help ourselves, for whatever good we give out completes the circle and comes back to us."