Q&A - P5 Science

[WWsylvia]

Deleted

[Iluvmygals]

xueyan\" post_id=\"1938829\" time=\"1569893764\" user_id=\"6643:

https://postimg.cc/tZ6CvD7K

Can help on this? The answer is 2

Look at the direction of the batteries. Only in 2 the batteries balance out in opposite direction...The rest current would flow from positive to negative in the direction of the stronger batteries

[.010675zeit]

xueyan\" post_id=\"1938829\" time=\"1569893764\" user_id=\"6643:

https://postimg.cc/tZ6CvD7K

Can help on this? The answer is 2

(1) and (3) are immediately eliminated as there's a closed circuit which allows EC to flow through.

(4) looks deceptively like the correct answer at first, but don't forget the extreme right battery's + terminal faces + terminal of the existing battery in above diagram, so they 'cancel' out each other. The remaining 2 extreme right and middle ones form a closed circuit and EC can still flow thru to light the bulb.

(2) EC will flow thru the middle and extreme right battery, but the problem is the extreme left battery's + terminal faces the + terminal of the existing battery in above diagram. The bulb in (2) will not light up.

So the answer is (2).

[.010675zeit]

WWsylvia\" post_id=\"1939016\" time=\"1569912657\" user_id=\"167225:

Something is wrong with this question. 1, 2, 3 and 4 are all answers. All the 4 arrangements of batteries will cause the bulb to not light up.

You can easily test this out at home if you have bulb, 4 batteries and wires with crocodile clips.

Nothing wrong. There's such a thing called bypass.

[xueyan]

Zeit, can you very kindly explain more about bypass?


All the while i thought only + - + - + - will work.

Thanks!

[.010675zeit]

xueyan\" post_id=\"1939052\" time=\"1569917596\" user_id=\"6643:

Zeit, can you very kindly explain more about bypass?

All the while i thought only + - + - + - will work.

Thanks!

out of pri syllabus, sorry...

but I believe school will teach them + facing + or - facing -, the EC can still flow thru, i.e. circuit is still closed.

[paithorn]

Hi, any one with recommendation for a good science tutor for P5 next year? Thank you

[nkh122019]

paithorn\" post_id=\"1944400\" time=\"1572707381\" user_id=\"55288:

Hi, any one with recommendation for a good science tutor for P5 next year? Thank you

you can try Ultimate Math & Science (97486085) if keen. East side

[regina99]

Any recommendation for P5 science home tutor, im located in the west, thank you.

[SashaL]

Hi


I am staying in Bt Batok.
Appreciate if you could recommend tuition center for P5 Science.
Thank you for your time.