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2brpB
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last edited
by johnlittlephysics 14 years, 2 months ago
BRP Project discussion
- Group B: Yu Ting, Carmen, Shi Ting
- First hypothesis: If copper in the wire is replaced by aluminium, then the brightness of the bulb might increase
- Revised hypothesis: If the diameter of the wires is related tot he current produced, then the wire with the greatest diameter will allow the greatest current to be passed through a closed circuit.
- Draft proposal form:
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2brpB
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Comments (17)
johnlittlephysics said
at 3:59 pm on Jul 3, 2011
Hypothesis feedback:
- follow the format of "if-then" for hypothesis
- independent variable: type of metal?
- dependent variable: brightness of bulb?
- mention bulb in a closed circuit
- resubmit hypothesis
Ng Yu Ting said
at 9:56 am on Jul 13, 2011
Hello Mr Ang, my group members are ShTing and Carmen.
If the copper in the wire is replaced by aluminium, then the bulb in the closed circuit might increase.
Ng Yu Ting said
at 7:26 pm on Jul 14, 2011
Hello Mr Ang, is there any light meters in the Science Labs? If yes, can we borrow them? Thank you. Oh and is our hypothesis acceptable?
johnlittlephysics said
at 1:26 am on Jul 17, 2011
Need to rework on hypothesis.
1. Pls refer to the BRP main wiki page at http://nyghsec1physics.pbworks.com/w/page/40655928/T3brp
for example/guidelines of the If-Then format of hypothesis.
2. Must work on the project proposal form (softcopy on main wiki page) quickly to realise the challenges. Experiment preferably to use simple equipment. Light meter not available in the lab.
3. the independent and dependent variables must be measurable or calculated in actual values.
independent variable - type of metal? several different metals needed for several sets of data
dependent variable - brightness of bulb need light meter or other sensors --> measure voltage or current?
4. Need to do background research on the internet about metals for electrical conduction
- relevance of project - copper wire is commonly used because it conducts electricity much better than most other metals
- it would be difficult to get other types of wires, can consider investigating characteristics of copper wires (do research) - may be able to get some from physics lab technician Mr Leong
Ng Yu Ting said
at 1:09 pm on Jul 17, 2011
If the type of metal in the wire is related to the brightness of light bulbs, then changing the metal in the wire might cause the brightness of a bulb in a closed circuit to increase.
Is this okay? We actually wanted to rmove the copper from the wires then put new matels inside. Erm do you know where to find light meters?
johnlittlephysics said
at 11:15 pm on Jul 17, 2011
Hypothesis: the 2nd part must mention which metal produce greatest or least brightness.
Light meter: can ask ICT staff/Mr Jack Tan in charge of school photography or video.
Ng Yu Ting said
at 9:23 pm on Jul 19, 2011
If the type of metal in the wire is related to the brightness of light bulbs, then changing the metal in the wire to silver might produce the greatest brightnesin for a bulb in a closed circuit.
johnlittlephysics said
at 11:17 pm on Jul 20, 2011
Feedback on BRP project proposal:
1. Hypothesis: check for typo error
2. Independent variable: Material - as mentioned this morning, silver is an expensive metal, so silver wire is not available. Arrange with me via SMS to visit physics lab technician to find out common types of metallic wires available. Alternately, may use one type of wire (copper) of different diameters.
3. Dependent variable: brightness - would need to find/loan a light meter to measure brightness. Or loan a light sensor from bio lab - would need to have a laptop to install a software to collect the data.
4. No. of sets of data: refer to the marking rubrics for the requirement.
5. Analyse data: from the table of results, usually use a graph to help in analysis and discussion.
Ng Yu Ting said
at 11:07 am on Jul 21, 2011
Hello Mr Ang. We would like to change our hypothesis to:
If the diameter or the wires are related to the brightness of light bulbs, then the wire with the greatest diameter will produce the greatest brightness for a bulb in a closed circuit.
johnlittlephysics said
at 6:22 am on Jul 24, 2011
Ok. Note "of" instead of "or".
Ng Yu Ting said
at 12:32 pm on Jul 23, 2011
Hello Mr Ang. When can we borrow the light sensor? And what software do we need to install?
johnlittlephysics said
at 6:26 am on Jul 24, 2011
I would not be in school next week (25 - 28 Jul). Ask your BRP teacher to help you loan out from any science lab technician - mention "light sensor for datalogger". Would also need to borrow a CD to install datalogger software on your personal notebook. Alternately, see me after i return on Fri 29 Jul.
Ng Yu Ting said
at 10:46 am on Jul 24, 2011
Hello Mr Ang. Is our proposal okay?
johnlittlephysics said
at 3:58 pm on Jul 24, 2011
Please read my "Feedback on BRP project proposal" posted above.
1. Update with your new hypothesis and other changes suggested.
2. Email me updated copy.
3. Go ahead with the experiments as soon as possible.
johnlittlephysics said
at 1:21 am on Sep 6, 2011
Feedback on draft report:
1. Abstract: note that with higher resistance in the circuit, there could be more electrical energy lost as heat, which may not be a desirable outcome.
2. Introduction: paragraph 2 and everywhere else - wires do not "produce" electricity; wires "allow" electrical current to flow through.
3. Methods:
- control variable - length of wire -> check d.p. of length of wire used.
- in the circuit diagram, label the wire used.
4. A: Step 3 - ... and the wires (instead of "one of")
5. Results & discussion: adjust top right corner of table
- Graph plotted - why are the vertical and horizontal axes "jagged"
- "... thicker wire is used, the resistance is higher" - should be "lower"
Ng Yu Ting said
at 11:04 pm on Sep 15, 2011
Mr Ang, sorry but we cannot complete the editing of the report in time as the group members uses different software. I used microsoft word but the other two members uses other softwares, so we need slightly more time to complete the editing of the report. Can we hand the BRP worksheet on Monday? Sorry!
johnlittlephysics said
at 12:04 am on Sep 16, 2011
ok.
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