Magnetism

taught by Math Arena

Course description

Overview

This course is targeted at Singapore Cambridge GCE O level students, but is also relevant to IGCSE students and Singapore's Integrated program students.

It's said that Albert Einstein first became interested in science when his father gave him a compass. The young Einstein was fascinated by how it kept pointing in the same direction. This would be one of the first incidents on his road to becoming one of the greatest physicists of the 20th century. In truth, the workings of a compass are fairly straightforward. This course hopes to unpack the principles of magnetism that underlie its operation, as well as the workings of other similarly mystifying physical processes.

Course Content

You will learn:

  • How to visualise and draw magnetic fields
  • How to make one magnet become two magnets
  • How to create magnets out of non-magnets
  • How to create non-magnets out of magnets
  • Lots of other cool stuff!

A link to the full O level Physics syllabus can be found here

Course Prerequisites

You will need to know:

  • How to watch videos on your computer
Math Arena
Math Arena

The instructor is from Math Arena.The instructor is absolutely passionate about teaching and you'll find the lessons engaging and ultimately rewarding.

Course Curriculum

The magnetic field - field line direction
29:57
Q17 A plotting compass is placed beside a bar magnet as shown below. Which of the drawings shows the correct direction of the compass needle?
Q18 Four plotting compasses are placed near a bar magnet. You may ignore any effects of the Earth’s magnetic field. One compass appears like this [image]. What is a possible position for this compass?
Q19 A compass is placed near a copper bar as shown in the diagram. In which direction will the compass needle point?
Q20 Which of the following diagrams shows the correct magnetic field pattern between the poles of two bar magnet?
Q21 Which diagram below indicates the correct magnetic field pattern between the poles of two bar magnet?
Q22 A compass is placed between two magnets of equal magnetic strength as shown in the diagram. In which direction will the compass needle point?
Q23 A compass is placed between two magnets as shown in the diagram. Magnet X is stronger than magnet Y. In which direction will the compass needle point?
Q24 Fig 1 below shows the magnetic field near a bar magnet and an object XY. In Fig 2, XY has been turned around. What could XY be?
Q25 The diagram below shows the magnetic field of 2 magnets placed close together. Three plotting compasses are placed at the locations shown. Which is the set of compasses showing the correct direction of the needles?
Q26 The diagram shows the magnetic field of 2 magnets placed close together with 3 plotting compasses placed at the locations shown. Which is the set of compasses showing the correct direction of the needles?
Q27 A bar magnet is placed in a uniform magnetic field as shown. The magnet will
Q28 The diagram shows a bar magnet being placed in a magnetic field. What will happen to the bar magnet?
Q29 The diagram at the below represents a bar magnet. The direction of the magnetic field at point P is toward point
Q30 In the diagram above, what is the direction of the magnetic field at point P?