Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
GENERATORS
15 practice questions
Practice questions
1–10 of 15
Question 1
1 mark · Easy
Answer and see the solution →State what happens if a wire is moved at right angles across a magnetic field.
Question 2
1 mark · Easy
Answer and check →Which change will NOT increase the voltage induced when moving a magnet into a coil?
- A.Moving the magnet faster
- B.Using a coil with more turns
- C.Using a weaker magnet
- D.Using a stronger magnet
Question 3
2 marks · Easy
Answer and see the solution →List two ways to increase the current produced in a wire when it is moved across a magnetic field.
Question 4
2 marks · Easy
Answer and see the solution →A student rotates a coil in a magnetic field but moves it very slowly. What will happen to the voltage induced, and why?
Question 5
3 marks · Easy
Answer and see the solution →A hand-held generator is used to power a lamp for a camping tent.
(a)[1 mark]Describe what happens inside the generator as you turn its handle.
(b)[2 marks]Explain why turning the handle faster lights the lamp more brightly.
Question 6
2 marks · Easy
Answer and see the solution →Describe what will happen if a magnet is held stationary inside a coil connected to a voltmeter.
Question 7
2 marks · Easy
Answer and see the solution →Complete the sentence: When a conductor cuts through magnetic field lines, ________ is induced in the conductor.
Question 8
2 marks · Normal
Answer and see the solution →A straight wire is moved rapidly across a uniform magnetic field. State what is induced in the wire and explain how you could increase the size of this effect.
Question 9
4 marks · Normal
Answer and see the solution →A student builds a device by pushing a bar magnet in and out of a coil of wire connected to a voltmeter.
(a)[2 marks]Explain why a voltage is seen on the voltmeter when the magnet moves.
(b)[2 marks]State two changes the student can make to increase the maximum voltage produced.
Question 10
3 marks · Normal
Answer and see the solution →A single straight wire is pulled at a speed of 0.5 m/s across a uniform magnetic field of strength 0.8 T. The length of the wire in the field is 20 cm. Calculate the maximum possible voltage induced across the ends of the wire.