
A student investigates how the resistance of a wire depends on its length.
The photograph shows the circuit that the student uses.

(a) Draw a circuit diagram to show how the components in the photograph are connected.(3)
(b) (i) Complete the table by naming the key variables in this investigation.(1)

(ii) Describe the method the student should use for this investigation.(5)
参考答案及解题思路
Part A is relatively straightforward; it requires the student to see the above photograph and to reprodu

这篇博客探讨了IGCSE Physics考试中关于电线电阻与其长度关系的实验研究。学生需要绘制电路图并设计实验,独立变量为电线长度,依赖变量为电阻,通过电压和电流测量电阻变化。实验设计包括调整鳄鱼夹位置控制电线长度,多次测量取平均值以提高准确性,并考虑温度等可能影响结果的因素。
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