WAEC Physics questions: Magnets and magnetic fields

9 questions with answers and explanations. Tap an option to check yourself.

1. Question 1· Magnets and magnetic fields· WAEC

   Which of the following materials is strongly attracted by a magnet?

   • AIron
   • BCopper
   • CAluminium
   • DBrass

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   Explanation and discussion

2. Question 2· Magnets and magnetic fields· WAEC

   A bar magnet can be demagnetised by

   • Ahammering it while it lies east-west
   • Bstroking it with another magnet
   • Cplacing it in a solenoid carrying direct current
   • Dstoring it with keepers

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   Explanation and discussion

3. Question 3· Magnets and magnetic fields· WAEC

   Which of these is a magnetic material?

   • Aaluminium
   • Bcopper
   • Cnickel
   • Dbrass

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   Explanation and discussion

4. Question 4· Magnets and magnetic fields· WAEC

   The angle between the magnetic meridian and the geographic meridian is called the

   • Adip
   • Bdeclination
   • Cinclination
   • Ddeviation

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   Explanation and discussion

5. Question 5· Magnets and magnetic fields· WAEC

   A magnet is best demagnetised by

   • Awithdrawing it slowly from a solenoid carrying alternating current
   • Bplacing it in a north–south direction
   • Cstoring it with keepers
   • Dcooling it

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   Explanation and discussion

6. Question 6· Magnets and magnetic fields· WAEC

   The angle between the magnetic and geographic meridians is the

   • Aangle of incidence
   • Bangle of dip
   • Ccritical angle
   • Dangle of declination

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   Explanation and discussion

7. Question 7· Magnets and magnetic fields· WAEC

   Soft iron keepers are placed across the poles of stored bar magnets to

   • Areverse their poles
   • Bmake them stronger permanently
   • Cprevent them losing their magnetism
   • Dmake them lighter

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   Explanation and discussion

8. Question 8· Magnets and magnetic fields· WAEC

   Iron filings sprinkled around a bar magnet gather most thickly at

   • Athe poles
   • Bthe middle of the magnet
   • Cplaces far from the magnet
   • Done side only

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9. Question 9· Magnets and magnetic fields· WAEC

   Magnetic shielding of a sensitive instrument is done by surrounding it with

   • Aa glass box
   • Ba copper sheet
   • Ca plastic case
   • Da soft iron ring

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   Explanation and discussion