Magnets quiz review

What happens to the magnetic field when the forces are repulsive (S-S or N-N)?

• The pointers curve away from each other in the middle.

• The pointers point directly at each other.

• The magnetic field becomes stronger.

• The magnetic field disappears.

What are the important parts of a speaker system?

• Speaker Cone, Coil of Wire, Magnet

• Battery, Switch, Light Bulb

• Resistor, Capacitor, Transistor

• Diode, Transformer, Inductor

How does the magnetic field change when we add another magnet to the system?

• The magnetic field remains unchanged.

• The magnetic field becomes weaker.

• The magnetic field looks different and can connect in the middle with pointers pointing in the same direction if attractive.

• The magnetic field disappears completely.

What is similar about the magnetic field of an electromagnet and a bar magnet?

• Both have no magnetic field

• Both have a magnetic field similar to a bar magnet

• Both have a thermal field

• Both have a gravitational field

When does the speaker cone vibrate?

• When the coil is connected to a sound source and the magnet is close

• When the coil is disconnected from the sound source

• When the magnet is far from the coil

• When the speaker is turned off

What happens to the sound when the speaker cone moves back and forth rapidly?

• The sound becomes quieter

• The sound frequency decreases

• The sound becomes louder

• The sound frequency increases

What component does the picture above represent?

• Battery

• Light bulb

• Ammeter

• Resistor

Which of the following can work as an energy source?

• Battery
  

• Light bulb

• Wire
  

• All of them

What is needed for forces between a magnet and a coil to occur?

• A switch

• A battery

• A resistor

• A light bulb

What is the shape of the space around a magnet called?

• Electric field

• Gravitational field

• Magnetic field

• Thermal field