ALL PHYSICS DOUBTS - POST HERE !!

[Ivo]

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!

[holtadit]

Silicon, or germanium.

What components are logic gates made from ?

[Vin]

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..

[Vin]

My guess is wavelength, but am not sure!

yup it has to be right ??

[Ivo]

What components are logic gates made from ?

Transistors right?

[the_grim_reaper]

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 ...

[8T]

yup it has to be right ??

I think its frequency

[the_grim_reaper]

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 .

[Dana]

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

[holtadit]

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 ...

I FINISHED PAPER 1

I am studying for PAPER 3

[Ghost Of Highbury]

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..

[6394]

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

[WARRIOR]

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

[Dana]

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

[Ivo]

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?