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Learners conducted an experiment to demonstrate electromagnetic induction using a magnet and a galvanometer - NSC Technical Sciences - Question 10 - 2022 - Paper 1
Question 10
Learners conducted an experiment to demonstrate electromagnetic induction using a magnet and a galvanometer. Study the diagram and answer the questions that follow.... show full transcript
Worked Solution & Example Answer:Learners conducted an experiment to demonstrate electromagnetic induction using a magnet and a galvanometer - NSC Technical Sciences - Question 10 - 2022 - Paper 1
Step 1
10.1 What is observed on the galvanometer when the magnet is moved into the coil?
Answer
When the magnet is moved into the coil, the needle of the galvanometer deflects, indicating that a current is being induced in the coil. This current causes a change in the deflection of the galvanometer needle.
Step 2
10.2 Explain the observation in QUESTION 10.1.
Answer
The observation can be explained by the principle of electromagnetic induction, which states that a change in the magnetic field within a coil induces an electromotive force (emf) in the coil. As the magnet approaches the coil, the magnetic flux through the coil changes, leading to the generation of emf and the resultant current, which is detected by the galvanometer.
Step 3
10.3 NAME and STATE in words the law used to explain this observation.
Answer
The law used to explain this observation is Faraday's law of electromagnetic induction. Faraday's law states that the magnitude of the induced emf in a coil is directly proportional to the rate of change of the magnetic flux through the coil.
Step 4
10.4 State THREE ways in which the deflection on the galvanometer can be increased.
Answer
- Increase the number of windings (turns) on the coil to enhance the induced emf.
- Increase the speed at which the magnet is moving to create a faster change in magnetic flux.
- Use a stronger magnet to generate a larger magnetic field, which results in a greater induced emf.