
當然,去英國留學最重要的考核方式就是A-level考試,A-level考試的成績也變得越來越重要,所以大家一定要努力備考,當然,在備考的同時也要關(guān)注A+國際教育帶來的最新A-level資訊,幫助大家更好的了解考試及英國的方方面面。
我們先來分析下這15分是如何分布的。
1.How to define the problem,3分。
2.Methods of data collection,5分。
3.Method analyze,2分。
4.Safety considerations,1分。
5.Additional parts,4分。
因此我們只需要抓住采分點,按分答題即可得到這15分。
在how to define the problem中,這3分分別對應(yīng)定義中的independent variable,dependent variable以及如何控制其他變量。
Methods of data collection則跟具體題目有關(guān),對于能得分的點是:label diagram,表明如何測量自變量,表明因變量如何測量,重復進行實驗,采用取平均值的方法來獲取所需數(shù)值,以及如何才能得到實驗需要的值。
第四部分:Safety considerations的1分也與具體實驗內(nèi)容有關(guān),一般用“precaution linked to…”來回答。最后的Additional detail則更為開放,可對測量方法進行補充(可以思考實驗的不足之處),也可以對安全問題進行補充,并且數(shù)據(jù)分析這塊的補充肯定是“Relationship is valid if the graph is a straight line passing through the origin or having a y-intercept”.
An alternating potential difference is applied to the vibrator.For a given peak,there is a maximum frequency at which the small mass remains in contact with the plate.The contact between the small mass and plate is lost when the frequency is greater than"f".
It is suggested that the relationship between and is
k=π2f2V
where"k"is a constant.
Design a laboratory experiment to test the relationship between"f"and"v".
首先我們先完成how to define the problem的3分:
"V"is the independent variable;
"f"is the dependent variable;
keep the position of the mass constant.
其次完成Methods of data collection的5個點:
labelled diagram showing signal generator connected to vibrator with two wires with mass on plate;
voltmeter connected in parallel with vibrator in a workable circuit;
measure"f"from signal generator;
detail regarding mass leaving the plate;
repeat each experiment for the same value of"V".
Method of analysis的2分較為簡單。
plot a graph off2against1/V;
k=gradient*π2
關(guān)于Safety我們可以指出:precaution linked to mass leaving vibrating plate.
最后我們補充4點內(nèi)容作為Additional detail。
先寫上萬能句:relationship is valid if the graph is a straight line passing through the origin;
wait for vibrator to oscillate evenly;
method to determine period of oscillation from c.r.o;
clean surfaces of metal plate.
以上就是A+國際教育帶來的如何回答A-level物理實驗設(shè)計的內(nèi)容,想要了解更多,更具體的A-level考試詳情的同學,歡迎關(guān)注A+國際教育,我們不間斷地更新以為你帶來更多的內(nèi)容。