Resistance of a wire at a constant temperature

12 questions

1. Match the following quantities to its unit symbol.
2. Which of the following can be used to calculate resistance?
3. Match each of the following types of variable to its definition.
4. When a current flows in a wire, which of the following moves through the wire?
5. In a graph showing the results of an experiment, where does each type of variable usually appear?
6. When there is an error in an experimental measurement, which of the following must be true?
7. A type of error that can affect results in an unpredictable way is called a ___ error.
8. A pupil investigates the relationship between the length of a wire and the resistance of the wire. Which of the following are control variables in this investigation?
9. Which of the following statements describes how to connect a voltmeter and ammeter to measure the resistance of a piece of wire in a circuit?
10. The diagram shows some of the apparatus for investigating the effect of length of a wire on its resistance. Which of the following will help keep the temperature of the wire constant?
11. Which of the following increase the resistance of a metal wire?
12. Sort the following sentences into the correct order to explain why the resistance of a wire may increase when a current flows in it.

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