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CAIE A-Level Physics 20.5.3 Magnetic Flux Linkage

Practise calculating flux linkage for coils and solenoids from NΦ, comparing linked flux when turns or field conditions change.

Syllabus
2028–2030
Course
Physics 9702
Level
A2

Exam points

  • define and calculate magnetic flux linkage for a coil
  • relate flux linkage to number of turns and magnetic flux

20.5.3—The concept of magnetic flux linkage question 1

[Maximum number: 3]

A square coil of wire of side length 12 cm consists of 8 insulated turns. The coil is stationary in a uniform magnetic field. The plane of the coil is perpendicular to the magnetic field, as shown in Fig. 6.1.

Fig. 6.1

Fig. 6.1

The flux density B of the magnetic field varies with time t as shown in Fig. 6.2.

Fig. 6.2

Fig. 6.2

Determine the magnetic flux linkage inside the coil at time t=0.60 st=0.60 \mathrm{~s}. Give a unit with your answer.

magnetic flux linkage =unit.............. [3]
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