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Uses of Electromagnets MCQ App & e-Book Download - 177

MCQ:

If someone carrying a knife or gun passes through a detector, it alters the rate of

  1. current
  2. voltage
  3. resistance
  4. magnetic field

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Uses of Electromagnets App (Android & iOS)

Uses of Electromagnets App (Android & iOS)

7th Grade Science App (Android & iOS)

7th Grade Science App (iOS & Android)

Earth Science App (Android & iOS)

Earth Science App (Android & iOS)

8th Grade Science App (Android & iOS)

8th Grade Science App (iOS & Android)