PSLE 2009 - Science

[janice_koh]

so its a moderate paper? I yet to hear from my boy…?

[hot_chocolate]

paper is easier than maths...


there's a question on circuits in booklet A... about the one with the light bulb that felt warm and did not light up.

anybody knows if the answer is:
1)the light bulb is faulty
2)the circuit is closed

this question is tricky. a lot of people have different answers, mainly this two. does anyone remember the exact question???? :frustrated:

[muaz999]

my answer is bulb is faulty

[kuzco]

My boy said the same for every subject, \"ok lah\". :stupid: :frustrated:

[hot_chocolate]

me too. bulb is faulty.

[justsay]

hot_chocolate:

paper is easier than maths...


there's a question on circuits in booklet A... about the one with the light bulb that felt warm and did not light up.

anybody knows if the answer is:
1)the light bulb is faulty
2)the circuit is closed

this question is tricky. a lot of people have different answers, mainly this two. does anyone remember the exact question???? :frustrated:

It could be bulb faulty and it could also be circuit is closed but insufficient energy source, depending on the question. Need to know the exact question.

[kat]

kuzco:

My boy said the same for every subject, \"ok lah\". :stupid: :frustrated:

at least your boy siad ok, my boy told me every subject also difficult.. :lol: :lol:

[kohjl]

hot_chocolate:

paper is easier than maths...


there's a question on circuits in booklet A... about the one with the light bulb that felt warm and did not light up.

anybody knows if the answer is:
1)the light bulb is faulty
2)the circuit is closed

this question is tricky. a lot of people have different answers, mainly this two. does anyone remember the exact question???? :frustrated:

Hi, I'm the son of kohjl and I've just sat for the science PSLE.

The diagramme showed a battery connected to a bulb, with a gap between the wires. In this gap was a rod called AB. The bulb felt warm but did not light up. Which of the following is true?

My answer: The circuit is closed.

My reason: Even though the bulb did not light up, it was warm and that means that there is electricity flowing through it BUT the electricity flowing through the bulb was not enough to light it up as either the battery was too weak or the rod AB was a poor conductor of electricity.However, the rod was not an insulator.

Glad to help!

[atutor2001]

hot_chocolate:

paper is easier than maths...


there's a question on circuits in booklet A... about the one with the light bulb that felt warm and did not light up.

anybody knows if the answer is:
1)the light bulb is faulty
2)the circuit is closed

this question is tricky. a lot of people have different answers, mainly this two. does anyone remember the exact question???? :frustrated:

Wah! really tough. To me \"bulb is faulty\" is the likely answer. But then if the circuit is closed but the voltage is not high enough to light up the bulb, will the heat from the tungsten wire be enough to cause the bulb to feel warm after a long time? Really tough.

PS
Sorry change my answer after seeing Kohjl's son's post. With picture of a circuit given, then \"the circuit is closed\" is likely the answer. Your reasoning is very good. Sure A*

[pinky88]

My boy comment : a bit difficult but at least he doesn't sound so demoralise like the Maths paper. I asked him if there were any qns tat he couldn't ans in bklet B & he said No. Hopefully can do above average la. Not hoping for very high mks cos' its never easy to score for Science paper.


:rahrah: One more paper to go, Jia You all those taking HCL 2moro.

My boy ans also \" the circuit is closed\".