Q&A - PSLE Science

[paranoid]

http://i48.tinypic.com/5btte8.jpg\">

Please help with this question

[charsen]

paranoid:

http://i48.tinypic.com/5btte8.jpg\">

Please help with this question

Hi
This question is a straight forward question.The aim is,to find whether if Material A is a conductor of electricity.Hence,it does not tests on material B.
Therefore,you should choose the circuit which has only material A.
Cheers

[verykiasumummy]

hi paranoid,


the answer is direct. option 1

circuit should hv only object A if wanna test if A is conductor of electricity or not.

[verykiasumummy]

charsen:

Hi

You cannot say that as the concept tested in this question is the consequences when magnet is placed beside the ezlink card.The magnet could have been placed behind the barcode.
Cheers

hmm, ya maybe... if it were to ask for possible reasons, mine will then be correct...

[paranoid]

charsen:

paranoid:

http://i48.tinypic.com/5btte8.jpg\">

Please help with this question

Hi
This question is a straight forward question.The aim is,to find whether if Material A is a conductor of electricity.Hence,it does not tests on material B.
Therefore,you should choose the circuit which has only material A.
Cheers

My answer key says 2... but I suppose I'm correct then.
Thanks.

[verykiasumummy]

paranoid:

charsen:

[quote=\"paranoid\"]http://i48.tinypic.com/5btte8.jpg\">

Please help with this question

Hi
This question is a straight forward question.The aim is,to find whether if Material A is a conductor of electricity.Hence,it does not tests on material B.
Therefore,you should choose the circuit which has only material A.
Cheers

My answer key says 2... but I suppose I'm correct then.
Thanks. :)[/quote]actually option 2 is the correct one. (after second thoughts)

using only object A does not mean B is conductor. (cos B may also be insulator) so should be option B, if bulb lights up, it proves A to be insulator and B to be conductor..

[charsen]

Hi paranoid,

The aim of the experiment is to find out if material A is a conductor of electricity.Thus,need not have to think of material B.
cheers.

[verykiasumummy]

sorry for my typo, i mean option 2 should be the answer since using only object B will be able to tell B is conductor and A is insulator…

[charsen]

verykiasumummy:

sorry for my typo, i mean option 2 should be the answer since using only object B will be able to tell B is conductor and A is insulator..

Hi
Option 1 is the answer.Refer to my previous post,i would have mentioned that to satisfy the aim of the experiment.Option 2 would tell object B is a conductor or a non conductor of electricity.Thus,option 1 is the clear answer.
cheers

[verykiasumummy]

hi charsen,


the question says she suspects object A is insulator, so if choose option 1, means u can tell if A is insulator, but cannot tell for B. so choosing option 2 will prove B is conductor, but A is not.