Testing series and parallel circuits using resistors and filament lamps.

Question 1

Outline the basic steps of the practical

Answer 1

1. Set up a circuit with two filament lamps in series, each with a voltmeter attached over them and an ammeter in series with them
2. Start on a low voltage and slowly increase the voltage, recording the potential difference and current values each time
3. Set up a second circuit with two lamps in parallel and once again record the potential difference and current values for
   increasing voltages
4. Compare the two arrangements

Question 2

Draw a circuit diagram for the series arrangement

Answer 2

https://pmt.physicsandmathstutor.com/download/Physics/GCSE/Notes/Edexcel/Practical-Skills/Flashcards/Flashcards%20-%20CP%205%20Circuits%20-%20Edexcel%20Physics%20GCSE.pdf

Question 3

Draw a circuit diagram for the parallel arrangement

Answer 3

https://pmt.physicsandmathstutor.com/download/Physics/GCSE/Notes/Edexcel/Practical-Skills/Flashcards/Flashcards%20-%20CP%205%20Circuits%20-%20Edexcel%20Physics%20GCSE.pdf

Question 4

Which lamp arrangement would you expect to have the greatest total resistance?

Answer 4

The two lamps in series will have a greater total resistance than the two lamps in parallel

Question 5

How would the total resistance of the parallel combination, compare to the lamps’ individual resistances?

Answer 5

The total resistance will be smaller than the smallest individual resistance

Question 6

What safety precautions should be taken when using filament bulbs?

Answer 6

● Avoid touching them when switched on since they can get very hot
● Be careful not to use too high a voltage to avoid blowing the filament