magnetism

Which direction do the arrows point when representing the magnetic field around a magnet?

• into N

• out of S

• into S

• out of N

Where is the magnetic field strongest around a bar magnet?

• in the middle

• at the poles

• same everywhere

• where the field lines are far apart

What device takes in mechanical energy and produces electricity?

• motor

• generator

• electromagnet

• battery

How could you make a stronger electromagnet?

• more coils of wire

• add an iron core

• more current in the wire

• all three

In the picture, what direction is the current flowing in?

• a. In the direction of the fingers

• a. In the direction of the thumb

• a. Opposite the direction of the fingers

• a. Opposite the direction of the thumb

What do the lines around this magnet represent?

• North Pole
• South Pole
• Magnetic Declination
• Magnetic Field

What percent of the electricity produced in the US in 2007 comes from renewable resources?

• 1.6%
• 3.1%
• 8.9%
• 51.5%

How can a wire become magnetic?

• point it north

• add a resistor

• heat it up

• run a current through it

What kind of magnet can be turned on and off?

• refridgerator magnet
• electromagnet
• magnetite
• iron

What type of energy goes into a motor?

• thermal

• radiant

• mechanical

• electrical