A LevelPhysicsEdexcelExam Questions7. Electric & Magnetic FieldsMagnetic Fields

Magnetic Fields (Edexcel A Level Physics): Exam Questions

Exam code: 9PH0

47 mins6 questions

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Magnetic Fields

1
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1 mark

Which of the following is a unit of magnetic flux?

  • N C−1

  • T m−2

  • V s

  • Wb m2

Choose your answer

2
1 mark

A rectangular coil has sides of length l and width w and carries a current I. The plane of the coil is parallel to a magnetic field of flux density B, as shown.

Rectangular coil between two bar magnets. Coil corners labelled Y (top-left), X (top-right), Z (bottom-left), W (bottom-right). Horizontal top edge YX and bottom edge ZW each have length w; vertical sides YZ and XW each have length l. A bar magnet with N pole faces the coil from the left; another with S pole faces it from the right — so the magnetic field points horizontally from N to S, parallel to YX and ZW. The coil is connected to a battery via a split-ring commutator and brushes.

Which row of the table gives the magnetic force on the named side of the coil?

Side

Magnetic force

A

YX

BIw to the right

B

XW

BIl to the left

C

WZ

BIw upwards

D

ZY

BIl downwards

    Choose your answer