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Energy and voltage in circuits

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Question 17
a.

The diagram shows part of an electric circuit.

An incomplete circuit template showing a battery at the top and Heater 1 at the bottom.

Explain how to complete the circuit diagram by describing where to place the following components:

  • a second heating element (Heater 2) connected in parallel with Heater 1
  • a variable resistor connected in series with the battery and the parallel heating elements
  • a voltmeter to measure the potential difference across the parallel combination of the heating elements
  • an ammeter to measure the total current passing through the battery
[4]
b.

The current in a new resistor is measured for different potential differences. The table below shows the results.

Potential Difference (V\text{V}V)Current (A\text{A}A)
1.50.06
3.00.12
4.50.18
6.00.35
7.50.30
9.00.36

Identify the anomalous data point in the table.

[1]
c.

State the equation linking potential difference, current, and resistance.

[1]
d.

Use the non-anomalous data to calculate the resistance of the resistor.

[2]

Energy and voltage in circuits Questions

  1. IGCSE
  2. /Physics
  3. /Energy and voltage in circuits