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CAIE A-Level Physics 20.4.1 Fields around Wires and Coils

Practise sketching magnetic fields around straight wires, circular coils and solenoids, identifying field direction and characteristic pattern features.

Syllabus
2028–2030
Course
Physics 9702
Level
A2

Exam points

  • sketch magnetic-field patterns around a long straight wire, flat circular coil and long solenoid
  • identify field direction and relative pattern features for each current arrangement

20.4.1—Magnetic field patterns due to the currents in a long straight wire, a flat question 1

[Maximum number: 3]

A long, straight wire P carries a current into the page, as shown in Fig. 6.1.

Fig. 6.1

Fig. 6.1

On Fig. 6.1, draw four field lines to represent the magnetic field around wire P due to the current in the wire.

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