The photograph shows a small generator - Edexcel - GCSE Physics - Question 5 - 2012 - Paper 1
Question 5
The photograph shows a small generator.
When the handle is turned the current produced lights a lamp.
(a) (i) Complete the sentence by putting a cross (X) in the bo... show full transcript
Worked Solution & Example Answer:The photograph shows a small generator - Edexcel - GCSE Physics - Question 5 - 2012 - Paper 1
Step 1
(i) Complete the sentence by putting a cross (X) in the box next to your answer.
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Answer
The correct option is D: is usually alternating in direction. This is because generators typically produce alternating current (AC) rather than direct current (DC), which usually comes from batteries.
Step 2
(ii) State the unit in which electric current is usually measured.
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Answer
The unit in which electric current is usually measured is the ampere (A).
Step 3
(iii) Describe what happens inside the generator to produce the current.
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Answer
Inside the generator, mechanical energy is converted into electrical energy. When the handle of the generator is turned, it rotates a coil within a magnetic field. This rotation causes the magnetic flux through the coil to change, inducing an electromotive force (EMF) according to Faraday's law of electromagnetic induction. As a result, an alternating current (AC) is produced, which flows through the electrical circuit and can light the lamp.
