Question Video: Understanding Electromagnetic Induction for a Moving Copper Ring | Nagwa Question Video: Understanding Electromagnetic Induction for a Moving Copper Ring | Nagwa

Question Video: Understanding Electromagnetic Induction for a Moving Copper Ring Physics • Third Year of Secondary School

Join Nagwa Classes

Attend live Physics sessions on Nagwa Classes to learn more about this topic from an expert teacher!

The diagram shows a bar magnet and a copper ring. Some of the field lines of the magnetic field produced by the bar magnet are shown. Fill in the blank. If the copper ring is moved away from the bar magnet, the number of field lines shown that will pass through it will _.

01:09

Video Transcript

The diagram below shows a bar magnet and a copper ring. Some of the field lines of the magnetic field produced by the bar magnet are shown. Fill in the blank. If the copper ring is moved away from the bar magnet, the number of field lines shown that will pass through it will (A) increase, (B) decrease, or (C) stay the same.

So in this image, a bar magnet is at at close distance to a copper ring. We need to decide how moving the ring away from the magnet will affect the number of field lines that will pass through the ring. We can answer this question by simply counting the number of field lines in the diagram that pass through the ring. Initially, we can count that four of the field lines shown will pass through the ring.

Now let’s imagine moving the ring away from the magnet, to here, for example. Now only two field lines pass through the ring. If we move the ring even further away, to here, only one field line passes through the ring. So the further the ring is from the magnet, the fewer the field lines that pass through the ring. This tells us that the answer must be option (B). If the copper ring is moved away from the bar magnet, the number of field lines shown that will pass through it will decrease.

Join Nagwa Classes

Attend live sessions on Nagwa Classes to boost your learning with guidance and advice from an expert teacher!

  • Interactive Sessions
  • Chat & Messaging
  • Realistic Exam Questions

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy