Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
ELECTROMAGNETISM
16 practice questions
Practice questions
11–16 of 16
Question 11
4 marks · Normal
Answer and see the solution →A straight wire carries a current vertically upwards. Plotting compasses are placed in a horizontal plane around the wire.
(a)[2 marks]Describe the shape of the magnetic field around the wire.
(b)[2 marks]State and use the right-hand grip rule to find the direction of the field when looking from above.
Question 12
2 marks · Normal
Answer and see the solution →State two ways to increase the strength of the magnetic field produced by a current-carrying wire.
Question 13
3 marks · Normal
Answer and see the solution →Draw a labelled diagram to show a uniform magnetic field between two bar magnets. Indicate the direction of the field.
Question 14
2 marks · Normal
Answer and see the solution →Explain why a soft iron core is used in an electromagnet rather than a steel core.
Question 15
4 marks · Normal
Answer and see the solution →A student wants to make the field of an electromagnet stronger.
(a)[2 marks]Give two adjustments they can make to the coil, apart from increasing the current.
(b)[2 marks]Describe and explain how adding a core to the coil would help.
Question 16
1 mark · Normal
Answer and check →Which statement correctly describes the direction of the magnetic field around a straight current-carrying wire using the right-hand grip rule?
- A.The field circulates in the direction of the left-hand fingers around the wire.
- B.The field circulates in the direction of the right-hand fingers when the thumb points in the direction of the current.
- C.The field radiates away from the wire perpendicular to the current.
- D.The field circulates in the opposite direction to the right-hand grip rule.