Question 14
FA student wants to measure the current in a lamp and the potential difference across the lamp.
The Figure shows the circuit that the student sets up.
Figure
a.[2]
Explain why the ammeter in the Figure does not measure the current in the lamp.
b.[2]
Explain why a voltmeter must be connected across the lamp to measure the potential difference across the lamp.
c.[2]
Describe how the student should change the circuit so that both meters are connected correctly.
d.[3]
The student corrects the circuit and closes the switch.
The ammeter reads 0.20 A for 3.0 minutes.
Calculate the charge that flows through the lamp.
10.1 Circuits, charge and current Questions
94 exam-style questions on Edexcel GCSE Physics 10.1 Circuits, charge and current, covering 10.1.1 Structure of the atom, 10.1.2 Circuit diagrams and symbols, 10.1.3 Series and parallel circuits, 10.1.4 Potential difference and voltmeters, 10.1.5 Energy transferred, charge and potential difference, and 10.1.6 Current, ammeters and charge flow. Each one has a worked solution and a mark scheme showing where the marks go.