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Energy and voltage in circuits

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Question 35
a.

The diagram shows part of an electrical circuit with a motor and a battery.

An incomplete circuit diagram template showing a three-cell battery at the top, a motor symbol (a circle with an 'M' inside) at the bottom, and open terminal wires on both sides.

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

  • a variable resistor in series with the motor and battery
  • a second motor in parallel with the first motor
  • a voltmeter that measures the voltage across the variable resistor
  • an ammeter that measures the total current in the circuit
[4]
b.

The current in a constant-resistance component is measured for different voltages. The table below shows the results.

Voltage (VVV) / V\text{V}VCurrent (III) / A\text{A}A
1.50.10
3.00.20
4.50.30
6.00.52
7.50.50
9.00.60

Identify the anomalous data point in the table.

[1]
c.

State the equation linking voltage, current, and resistance.

[1]
d.

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

[2]

Energy and voltage in circuits Questions

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