Magnetism

The diagram below shows a bar magnet. Which direction best represents the direction of the needle of a compass placed at point A?

• left
• right
• up
• down

The diagram below represents the magnetic lines of force around a bar magnet. At which point is the magnitude of the magnetic field strength of the bar magnet the weakest

• A
• B
• C
• D

A student sprinkled iron filings around a bar magnet and observed that the filings formed the pattern shown below. The magnetic field is strongest at point

• A
• B
• C
• D

The field around a permanent magnet is caused by the motions of

• protons
• neutrons
• electrons
• nuc

Two bar magnets are placed parallel to each other, North to North and South to South. Which statement best describes the forces between the bar magnets?

•  Gravitational force and magnetic force are both repulsive
•  Gravitational force and magnetic force are both attractive
• Gravitational force is attractive and magnetic force is repulsive
• Gravitational force is repulsive and magnetic force is attractive

A magnetic compass points towards the north geographic pole of the Earth because

• all magnetic poles, north or south, point that way due to the spin of the Earth.
• there is a north magnetic pole near the north geographic pole.
• there is a south magnetic pole near the north geographic pole.  
• the static electricity in the atmosphere causes the alignment of the compass.  

Which of the following shows the magnetic field correctly around a bar magnet?

• A
• B
• C
• D

The diagram below shows an electron, e, located in a magnetic field. If a compass was placed at the point of the electron, it would point

• left
• right
• up
• down

A compass points to the left. Where was this compass placed?

• A
• B
• C
• D

A student sprinkled iron filings around a bar magnet and observed that the filings formed the pattern shown below. What is false about the iron filings experiment

• it can show you the direction of the magnetic field
• it can show you repulsion or attraction
• it can show you where the field is weakest
• it can show you where the field is strongest