A student connects each of three conducting strips on its own directly across a 3.0 V supply and measures the current through it. The results are shown in the table.
| Conducting strip | Current in A |
|---|---|
| A | 0.30 |
| B | 0.20 |
| C | 0.10 |
Which statement is correct?
Strip A has the greatest resistance because the most charge flows through it each second
The greatest resistance cannot be found without knowing the length of each strip
Strip C has the greatest potential difference across it because it carries the smallest current
Strip C has the greatest resistance because it carries the smallest current
82 exam-style questions on AQA GCSE Physics 2.1 Current, potential difference and resistance, covering 2.1.1 Standard circuit diagram symbols, 2.1.2 Electrical charge and current, 2.1.3 Current, resistance and potential difference, and 2.1.4 Resistors. Each one has a worked solution and a mark scheme showing where the marks go.