CADD Electrodynamic Theory

Which one, top or bottom, offers more resistance?

• top
• bottom
• neither

What kind of magnet can be turned on and off? (Man-made magnet)

• refrigerator magnet
• electromagnet
• magnetite
• iron

Choose the best option to complete this gap:
A magnetic field is the ________ around a magnet in which the magnetic force acts.

• pole
• electron
• area
• iron

Tags

NGSS.MS-PS2-3

How do you increase the strength of an electromagnet?

• Decrease the number of batteries and increase the number of coils
• Increase the electric current and decrease the batteries
• You cannot strengthen an electromagnet
• Increase the electric current and increase the number of coils

Tags

NGSS.MS-PS2-3

Which device uses mechanical energy to produce electrical energy?

• Electric Motor
• Magnet
• Generator
• Solar Cell

Tags

NGSS.MS-PS3-5

Diodes...

• allow current to flow in one direction
• allow current to flow in two directions
• are resistors
• give off light

Tags

NGSS.MS-PS2-3

Two particles with the same charge will repel or drive away from each other.

• True

• False

Materials that allow electricity to flow through them easily such as copper are called

• insulators

• semiconductors

• conductors

Materials that don't allow electricity to flow throught them easily are called

• insulators

• conductors

• semiconductors

• gravity

When one has connected a conductor, a source of electricity such as a battery and an appliance such as a bulb, one has created an electric

• switch

• insulator

• circuit