**Paper 1 H - SAMPLE SET 1 Q19**

19) A student takes voltage and current measurements for four resistors.

The table shows the results from this experiment.

The table shows the results from this experiment.

(a) Which two resistors have the same resistance value? Use the data to show this. [2]

(b) Calculate the maximum resistance that can be made using all four resistors. [1]

(b) Calculate the maximum resistance that can be made using all four resistors. [1]

answer: ...........................

**Ω**

(c) (i) Draw a circuit diagram that could be used to find out how the resistance of a filament bulb changes with current.

Describe the readings you need to take. [4]

(ii) Sketch the shape of the graph using the axes below.

Describe the readings you need to take. [4]

(ii) Sketch the shape of the graph using the axes below.

State how this graph can be used to calculate resistance at any specific value of current. [2]

(d) A voltmeter is used to measure the output voltages produced from the circuit.

The voltmeter is not connected to a circuit and not recording a voltage.

(d) A voltmeter is used to measure the output voltages produced from the circuit.

The voltmeter is not connected to a circuit and not recording a voltage.

Name the error on the voltmeter and suggest how it should be dealt with. [2]

**(Total for Question 19 = 11 marks)**