A LevelPhysicsEdexcelExam Questions7. Electric & Magnetic FieldsMagnetic Fields

Magnetic Fields (Edexcel A Level Physics): Multiple Choice Questions

Exam code: 9PH0

59 mins9 questions

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Magnetic Fields

1
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

Which of the following is an equivalent unit to the weber?

  • N A m

  • N A m−1

  • N A−1 m

  • N A−1 m−1

Choose your answer

3
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

    4
    1 mark

    A proton moves horizontally to the right towards a region of uniform magnetic field, as shown.

    A proton, drawn as a small circle labelled with a plus sign, moving to the right towards a square region of uniform magnetic field. The field into the page is shown as a grid of cross symbols.

    The magnetic field is directed into the page.

    Which of the following gives the direction of the force on the proton as it enters the magnetic field?

    • into the page

    • out of the page

    • upwards, in the plane of the page

    • downwards, in the plane of the page

    Choose your answer